City Police Commissioner J Purna Chandrarao today flagged off World Kidney Day walk here. More than 500 people participated in the walk from Rama Krishna beach road to YMCA. Apollo Hospitals has organised a health awareness walk in the morning. Those presence on the occasion included Dr T Ravi Raju MD DM, former Director Medical Education and the Chief Nephrologist, Apollo Hospital. The participants included Experts Dr B B Phani Kumar, Dr J A L Ranganath, Dr P V Naresh Kumar, Dr N K Panigrahi, Dr Ramesh Babu, Dr Siva G Prasad, Dr Srinivas, nursing students and school children. UNI