Received: 12 April 2021
Accepted: 26 August 2021
First Online: 9 September 2021
: The study was approved by IRB (Institutional review board) of Faculty of Medicine Assiut University and of National heart institute (the Committee’s reference number is not available). Oral and written consents were obtained prior to the study, from each participant after proper orientation regarding the objectives and impact of the study. Data confidentiality was ensured throughout the whole study and protected against disclosure. The study was carried out in accordance with recommendations of the Declaration of Helsinki.
: Not applicable.
: The authors declare that they have no competing interests.