Our specialist physicians
Dr Robyn O'Sullivan
Robyn is a senior respiratory and sleep physician and principal of GRSC. She has extensive experience in sleep disorders with strong clinical and laboratory focus. Special interests include dental appliances for obstructive sleep apnoea, complex sleep disordered breathing, narcolepsy, respiratory muscle and chest wall disorders, and dyspnoea. She thoroughly enjoys her busy clinical private practice, as well as being clinical director of NATA accredited SleepCare Sleep Laboratories. She is a GPH supervisor of both respiratory and sleep medicine physician training and has research interests in mandibular advancement splints, positional therapy and bilateral hypoglossal nerve stimulation in OSA, and PTSD and sleep.
Dr Sophie Williams
Sophie is a respiratory and sleep physician who completed her undergraduate medical degree in Leicester UK in 2002 and completed her physician training in Queensland in 2011. She has a special interest in sleep disorders, both respiratory and non-respiratory. She works in private practice in Brisbane and also does some regional Queensland clinics.
Dr Kieren Brown
Kieren is a Specialist Respiratory and Sleep Physician available for consultation in all areas of respiratory and sleep medicine. He has special interests in lung cancer, bronchoscopy and pleural disease. He is a reporting physician for SleepCare and has experience in non-respiratory sleep disorders.
Kieren also holds an appointment at Ipswich Hospital. He is actively involved in the training of medical students and is an Education Supervisor for the Physician training program.
Dr Yashu Chang
Dr. Chang is a highly experienced Respiratory and Sleep Medicine specialist, who is dedicated to providing high-quality, patient-centred care and manages a broad spectrum of sleep disorders.
Dr. Chang obtained her medical degree from the University of Otago, School of Medicine in New Zealand. She completed her fellowship in Sleep Medicine at the Royal Prince Alfred Hospital in Sydney in 2016.
With extensive clinical experience across Australia and New Zealand, Dr. Chang has held various key roles, including Respiratory Physician at North Shore Hospital (Auckland, NZ), Respiratory and Sleep Physician at Blacktown Hospital (Sydney, Australia), and Consulting Clinician at the Woolcock Institute of Medical Research in Sydney. She has also served as a Clinical Lecturer at Western Sydney University, where she contributed to undergraduate medical education.
Dr. Chang’s research interests have focused on the relationship between sleep- disordered breathing and the cardiovascular system. Fluent in English, Mandarin, and Taiwanese, Dr. Chang brings a multicultural and inclusive approach to her practice. Now based in Brisbane, she is committed to delivering expert care to patients at Greenslopes Respiratory and Sleep Centre.
