The Larval Stages of Echinostoma spp. in Freshwater Snails as the First and Second Intermediate Hosts in Gilan and Mazandaran Provinces, Northern Iran - Aryaiepour, Mojgan; Mazaheri Nezhad Fard, Ramin; Molai Rad, Mohammad Bagher; Pirestani, Majid; Rouhani, Soheila; Daryani, Ahmad; Asadi, Tina; Sarvi, Shahabeddin; Rokni, Mohammad Bagher (Iranian Journal of Parasitology, 2023)