Prevalence of Blastocystis in Patients Referred to Bushehr Medical Centers and Its Relationship with Urticaria oleh Marjan Gandomkar, Moradali Fouladvand, Hasan Malekizadeh, Mohammad Rayani, Bahram Ahmadi, Neda Shadvar, Alireza Sahebani, Narges Khatun Gharibi, Afshin Barazesh