Dr. HC Chang is trustworthy othopaedic professional in Singapore with more than eighteen years of working experience who also specialises in various knee circumstances, accidents, treatments & surgical procedures. Received several awards and accolades within the Orthopaedic discipline. Autologous protein remedies (APS) injections are a more recent category of knee injections https://www.theorthopaedicandpainpractice.com/understanding-knee-pain-and-how-to-manage-it-in-singapore/