1. The Azrieli Faculty of Medicine, Bar-Ilan University, Safed, Israel;
2. Department of Pediatrics, Baruch Padeh Medical Center, Poriya, Israel;
3. Reference Parasitology Laboratory, Central Laboratories, Ministry of Health, Jerusalem, Israel;
4. Pediatric Gastrointestinal Unit, Baruch Padeh Medical Center, Poriya, Israel;
5. Clinical Microbiology Laboratory, Baruch Padeh Medical Center, Poriya, Israel