We provide you with trustworthy and accurate content only

Our articles are reviewed by medical professionals in order to provide you with trustworthy and accurate content.

Meet the Team

Debra Henline Sullivan, PhD, MSN, RN, CNE, COI

Debra Henline Sullivan Dr. Debra Sullivan has been in the medical field for over 40 years and enjoyed a long nursing career holding nursing leadership positions at suburban and urban hospitals. She is a senior core faculty at Walden University. She has taught nursing students since 1999 at the LVN, BSN, MSN, and PhD levels and continues to look for innovative ways to educate nurses in making qualified clinical judgements. As a nurse leader, she has participated in promoting nursing and is currently active in holding leadership positions in many professional organizations. She presents often at international, national, state, and local nursing professional venues and webinars. She is a prolific author, publishing articles in nursing journals on a regular basis and has authored book chapters.
Social media profiles: Email:

Po-Chang Hsu, M.D., M.S., Medical Content Expert at Sleepingocean

Po-Chang Hsu

Po-Chang Hsu, M.D., received his medical doctor degree from Tufts University School of Medicine in Boston in 2016. During his medical school training, Dr. Hsu worked with various patients, including adult and pediatric patients with acute and chronic conditions. Dr. Hsu’s interests include neurology, pediatrics, and neonatology.

Before medical school, Dr. Hsu finished a master’s degree at Harvard University and wrote a thesis on neuroimaging in schizophrenia patients at Brigham and Women’s Hospital, a Harvard Medical School-affiliated hospital. Dr. Hsu was also a part of the team of the 2008 NASA Phoenix Lander Mission, which sent a robotic spacecraft to the North polar region of Mars. Dr. Hsu also had research experience at Boston Children’s Hospital, another Harvard Medical School-affiliated Hospital, on neuroimaging in neonates.

Since graduating from medical school, Dr. Hsu has been working as a full-time medical writer and consultant. He has experience writing and ghostwriting books and articles for physicians and health technology start-up companies. Dr. Hsu believes good communications between healthcare providers and patients create the best results.

Social media profiles:


Recently Featured in:

Huffpost Logo
Very Well Family Logo Logo