[1] Priyamvada Birla Aravind Eye Hosp, Ocular Microbiol Lab Serv, Kolkata 700017, W Bengal, India
[2] Priyamvada Birla Aravind Eye Hosp, Cornea Serv, Kolkata 700017, W Bengal, India
[3] Priyamvada Birla Aravind Eye Hosp, Refract Serv, Kolkata 700017, W Bengal, India
[4] Vidyasagar Univ, Dept Microbiol, Midnapore, India