Knee replacement surgery is one of the most common operations performed in Hong Kong, with a long waiting time at public hospitals that drives many to pay more for private treatment. But a patient hoping to compare prices at the city’s 14 private hospitals will find it hard to get a clear idea of how much the procedure may cost. Only half the hospitals provide information online for knee replacement surgery packages, with prices ranging from HK$88,000 (US$11,200) to about HK$330,000 for one...