Quality and accountability of large language models (LLMs) in healthcare in low- and middle-income countries (LMIC) : a simulated patient study using ChatGPT / Yafei Si (University of New South Wales), Yuyi Yang, Xi Wang, Ruopeng An (Washington University in St. Louis), Jiaqi Zu (Duke Kunshan University) [und 3 weitere] ; IZA Institute of Labor Economics