Fifteen-year incidence rate and risk factors of pterygium in the Southern Indian state of Andhra Pradesh

Khanna, R. C.; Marmamula, S.; Cicinelli, M. V.; Mettla, A. L.; Giridhar, P.; Banerjee, S.; Shekhar, K.; Chakrabarti, S.; Murthy, G. V. S.; Gilbert, C. E.; Rao, G. N.