Trichostrongylus colubriformis: Possible Most Common Cause of Human Infection in Mazandaran Province, North of Iran - Gholami, Shirzad; Babamahmoodi, Farhang; Abedian, Rohallah; Sharif, Mehdi; Shahbazi, Abbas; Pagheh, Abdolsattar; Fakhar, Mahdi (Iranian Journal of Parasitology)