Banita Negi1, Pratima Thakur2, Yamini Sharma1, Vishal Jamwal2, Chander Shekhar2
1Department of paediatrics, Rajendra Prasad Government Medical College, Tanda, kangra, H.P. 2Department of Paediatrics Shri Lal Bahadur Shastri Government Medical College, Nerchowk, Mandi, H.P.