Darjani, Abbas http://orcid.org/0000-0002-7860-5232
Joukar, Farahnaz http://orcid.org/0000-0001-8432-8879
Naghipour, Mohammareza http://orcid.org/0000-0002-9142-1147
Asgharnezhad, Mehrnaz http://orcid.org/0000-0002-0409-3852
Mansour-Ghanaei, Fariborz http://orcid.org/0000-0002-6264-0025
Article History
Received: 5 August 2020
Accepted: 28 September 2020
First Online: 8 October 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: The PGCS design was approved by the ethics committees at the Ministry of Health and Medical Education, the Digestive Diseases Research Institute (Tehran University of Medical Sciences), and also Guilan University of Medical Sciences (P/3/132/215).
: Before participation, all participants received oral and written study information and signed a written consent form.