Molecular survey of certain protozoan agents that cause diarrhea in children in Sudan [version 3; peer review: 1 approved, 3 approved with reservations, 2 not approved] oleh Hongwei Shen, Mosab Adam, Isam M. Khidir, Azza B. Musa Musa, Abdel R. El Hussein, Khalid-A Enan, Hao Wang, Xuejun Ma