Hong Kong has one of the world’s top-ranked medical services, providing the city’s 7.4 million people with care that has a good reputation for availability, affordability and quality. But the universal, low-cost public health care system has a downside – including long waiting times and relatively less comfort and privacy than private-sector patients get. The public system also faces a shortage of practitioners, a serious issue the city will increasingly have to grapple with as its…