Marwaha R K, Singh R P, Garewal G, Marwaha N, Prakash D, Sarode R
Department of Paediatrics, Postgraduate Institute of Medical Education and Research, Chandigarh, India.
Acta Paediatr Scand. 1990 Nov;79(11):1118-20. doi: 10.1111/j.1651-2227.1990.tb11394.x.