HCRC is directed by Isabel C. Arnold RN, BSN, CCRC a bilingual, certified, and
    highly experienced clinical research coordinator who entered the clinical research
    field in 1993.

    Isabel is from Chile, where she graduated from "La Universidad Catolica de Chile" in
    1990 as a Registered Nurse. For the following six years she worked and gained
    experience in the areas of pediatrics, OBGyn, internal medicine, and cardiology. In
    1993 she also began to participate in clinical research trials, mainly in the areas of
    women's health and internal medicine.

    In 1996 she was hired by Merck, Sharp & Dohme as a clinical research coordinator.
    during the nearly five years that she worked with Merck she attended numerous
    training courses sponsored by the company. She also opened and ran several
    study sites with trials in the areas of cardiology, neurology, bronco-pulmonary and
    women's health.

    In October of 2000 she moved to Denver, Colorado with her fiancé and soon to be husband, Bill Arnold.

    After learning English she continued her career in clinical research at the University of Colorado Cancer Center in
    phase I studies. There she had the opportunity to not only run clinical trials but also to re-organize and manage
    the phase I laboratory. While working at UCHSC she prepared and passed the examination to obtain her RN
    qualification in Colorado.

    After three and a half years working at UCHSC and prior to becoming the director of HCRC she moved to a private
    site as a clinical research coordinator where she ran studies in phases II to IV. She eventually became the site
    manager and under her management the site was recognized by more than 20 pharmaceutical companies, Clinical
    Research and Site Management Organizations in the United States and Europe for the superb quality and
    professionalism of its work. During this period she also obtained her certification as a Clinical Research
    Coordinator through the Association of Clinical Research Professionals.

    Outside of work Isabel and Bill enjoy international travel, landscaping and remodeling their home, hiking in the
    Rockies, and of course a fine glass of Chilean wine in the evening.





    Bill Arnold has been the Business Manager for HCRC since the Center’s inception in early 2007.  Among his
    responsibilities are: the company finances; data management; website design, creation, and maintenance;
    volunteer recruitment; marketing, human resources, and management of the Center’s facilities and information
    technology. In addition to his duties at HCRC Bill was also a member of the Institutional Review Board (IRB) at
    National Jewish Health for two years.

    Bill graduated in 1995 from Southern New Hampshire University at the top of his class with a Bachelor of Arts
    degree in International Business. In 1996 he became the Assistant Director of an international language center in
    Santiago, Chile and was in charge of the Scheduling Department, Study Abroad Department, marketing of the
    Study Abroad Program, and management of over 80 teachers.

    In the fall of 2000 Bill accepted the position of Director of Admissions at the language center’s headquarters in
    Denver, Colorado and moved back to the United States with his fiancée, Isabel. During the following four and a
    half years Bill was responsible for the sales and admissions for the company’s schools in Denver, Colorado;
    Santiago, Chile; Buenos Aires, Argentina; Rio de Janeiro, Brazil and affiliated schools throughout Latin America
    and Spain. He also participated significantly in the international marketing of the language programs, website
    design, and creation of brochures and other marketing materials.

    In the fall of 2004 Bill started his own real estate investment company and within a few months began devoting his
    full attention to his new business. After three successful years in real estate investing Bill now devotes his time and
    energies to his duties at HCRC.

    Outside of work Bill and Isabel enjoy international travel, landscaping and remodeling their home, hiking in the
    Rockies, and of course a fine glass of Chilean wine in the evening.





    Tracy Chavez, PA-C, BHS, MMS

    Tracy began her career in healthcare in 2002 when she obtained her Associate of Science degree and her
    Medical Assisting certificate. Since that time she has worked hard and studied hard to continuously grow in her
    profession. In 2006, she earned her Physician Assistant Certificate and completed the course of study for a
    Master of Medical Science degree in conjunction with her Physician Assistant Program. In 2009 she fulfilled the
    final academic requirements for her Bachelor of Health Science degree and was awarded both her Bachelor of
    Health Science and Master of Medical Science Degrees.

    She has training as a Physician Assistant in the areas of family medicine, women’s health, orthopedics, pediatrics,
    surgery, emergency medicine, internal medicine, and trauma. At present she divides her time between working as
    a Physician Assistant at the offices of Denver Internal Medicine and as a clinical research sub-investigator at
    HCRC. She enjoys being able to apply her skills and knowledge in two distinct areas of healthcare.

    Tracy received her training and certification in the GCP/ICH guidelines early in 2008 prior to beginning her role as
    a sub-investigator at HCRC. To date she has been a sub-investigator on a wide range of clinical trials including:
    Acute Low Back Pain, Chronic Low Back Pain, High Cholesterol, Hypertension with Type 2 Diabetes, Hypertension
    in Minorities, Type 2 Diabetes, several Overactive Bladder studies, and numerous dermatological studies.

    Her work ethic, rapport with patients, attention to detail, love of challenge and her evident skills as a Physician
    Assistant makes her a wonderful and integral part of the HCRC team.

    While away from work, Tracy spends much of her time with her husband of 19 years and her three daughters. In
    her free time Tracy enjoys running, home decorating projects, and listening to music.



    Liza Cooper Freehling, MS, WHNP, RN

    Liza’s first university degree was a Bachelor of Arts in Psychology that she obtained in 1993. She followed that with
    a Bachelor of Science in Nursing degree in 1997 and then in 2008 she attained her Master of Science in Nursing
    with a Focus on Women’s Health Care degree. Over the decade between her Registered Nurse and Nurse
    Practitioner degrees she worked at Rose Medical Center, Littleton Hospital and Aurora Women’s Health. Although
    her duties and responsibilities as an RN were broad in nature, her interest and primary focus was in the area of
    women’s health.

    Liza now divides her time and responsibilities between her role as a Nurse Practitioner at Partners in Women’s
    Health, a multi-physician office specializing in obstetrics and gynecology, and her position as a clinical research
    sub-investigator for Horizons Clinical Research Center, LLC.  In addition to her training and certification in the
    GCP/ICH guidelines, Liza has acquired a number of training certificates and professional credentials during her
    career.  Liza has been a Sub-Investigator on a number of clinical studies including: Overactive Bladder,
    Diabetes/Hypertension, Plaque Psoriasis, Post-menopausal Symptoms, Endometriosis, and a Post-menopausal
    Low Sexual Desire study.

    Liza’s enthusiasm for her profession and the field of clinical research, her professionalism, her years of experience
    in health care, and her evident rapport and concern for her patients makes her an important and valuable part of
    HCRC’s research team.

    When not pursuing her career Liza loves being outdoors in her home state of Colorado (skiing, biking, camping,
    fishing, hiking), and spending time with her family and friends.








    Our goal at HCRC is to provide the highest quality study results possible to the sponsors and CROs that we work
    with while ensuring the protection of the rights and safety of the subjects who participate in our studies. The fact
    that we have an excellent reputation for the service we provide is due to the knowledge, skills, and integrity of our
    director, Isabel Arnold RN, BSN, CCRC. We know that the key to providing quality service depends to a large
    extent on the quality of the CRCs that conduct our studies. It is for that reason that we hire health care
    professionals without experience in research and train them how to be excellent CRCs. Isabel personally trains
    each and every new CRC we employ and then continues to mentor them with the goal that we have the best
    trained research professionals possible. This method of acquiring high quality professional CRCs is time
    consuming and requires a great deal of effort on the part of Isabel, but our goal to have a highly trained staff of
    CRCs who truly care about the quality of their work is worth it.

    Erika Enriquez-Wickwar, LPN, CRC

    Erika has wide-ranging work experience and has held positions as diverse as: legal assistant, escrow coordinator,
    and model for a promotional events company. The one thing that all of her jobs have had in common though is
    that they all entailed working with people. Erika has always known that working with, and helping people, was what
    she wanted to do. It is probably for that reason that she has always been interested in the health care field and the
    reason she finally decided to pursue her nursing degree.  Her nursing studies began in Texas and continued after
    moving to Denver. In the interim she decided that she would like to take her nursing career a step at a time so in
    2008 she obtained her LPN certificate.

    Her work experience in health care has been obtained through her internships and includes the areas of medical-
    surgery, pediatrics, orthopedics, OB/GYN, gerontology, and psychiatrics. Now as a Clinical Research Coordinator
    at HCRC her experience will grow considerably in the areas of dermatology, gynecology and internal medicine.
    Erika also continues to study part-time to obtain her goal of becoming a Registered Nurse.

    HCRC is fortunate to count Erika as part of our research staff. Her pleasant personality, easy way with people, and
    genuine concern for her patients enable her to quickly develop and maintain patient rapport.  Her natural attention
    to detail and innate sense of organization are also important aids in her work as a CRC. Erika is also bilingual in
    English and Spanish which enables her to work easily with both of our patient populations.

    When not at work Erika likes to travel, enjoy nature, and jog outside if it is warm and sunny. She also likes to cook
    with her husband and spend time with family and friends.


    Lucia Medina, RN, ASN, CRC

    Lucia has always been interested in working in the field of medicine and in fact earned her medical doctorate in
    Mexico. She worked as a general physician from 2002 to 2003 at a rural clinic in Chihuahua until moving to the
    United States with her husband.  

    In the intervening years she has learned English, grown her family by three, and in order to work in the medical
    field went back to school first earning her Medical Assistant certificate, then her license as a  Practical Nurse, and
    then finally her license as a Registered Nurse. She continues to study with her sights set on becoming a Nurse
    Practitioner.

    We are fortunate and pleased to have Lucia working with us. She exhibits all the qualities of an excellent Clinical
    Research Coordinator with dedication to her patients, insistence on clean and accurate data, strong organizational
    skills, attention to detail, ability to multi-task, willingness to take on new challenges and of course her natural
    concern as a health care professional for her patients. She relates well with her study subjects easily making them
    feel comfortable and confident that they will receive the quality of care and attention at Horizons that they
    deserve.  Her bilingual skills enable her to work equally as well with both our English or Spanish speaking
    volunteers.

    In her free time Lucia likes to spend quality time with her kids and family members, listen to music, and watch a
    good movie.







    Azucena Tabuyo, MA

    Azucena (Susy) received her Medical Assistant Certification in 2007 through the Lorenzo Walker Institute of
    Technology in Naples, Florida where she also became a member of the Honor Roll of American Association of
    Medical Assistants. Rather than remaining in Florida to ply her new profession she decided to return home to
    Denver with her two children.

    HCRC was fortunate to hire her as a Research Assistant / Medical Assistant and she has proven to be an
    invaluable asset to our research team. Susy has received her training and certification in the GCP/ICH guidelines
    and is also certified to ship infectious and biological substances. Among her many other duties she is in charge of
    the laboratory and is responsible for processing and shipping all study samples.

    Susy is a hard worker, learns quickly, is very conscientious, and has a wonderful sense of humor. Her natural
    rapport with patients is very evident, and as she is also bilingual in English and Spanish, she works well with all of
    our patients.

    When she is not working, Susy likes to spend time with her children, play bally-ball, and of course, go shopping.

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Staff

Below you will find the positions and personal profiles of all our staff.

Director
Business Manager
Sub-Investigators
Clinical Research Coordinators
Clinical Research Assistant

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