affiliation not provided to SSRN, affiliation not provided to SSRN, Cairo University, Maria Curie-Sklodowska University, affiliation not provided to SSRN, Maria Curie-Sklodowska University, The John Paul II Catholic University of Lublin, Cairo University, Cairo University, Cairo University, Medical University of Lublin, Medical University of Lublin, Medical University of Lublin, Medical University of Warsaw and Medical University of Warsaw