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Article History

Received: 22 June 2019

Revised: 25 November 2019

Accepted: 4 December 2019

First Online: 21 December 2019

Compliance with ethical standards

:

: None.

: All procedures performed in this study involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.

: Informed consent was obtained from all individual participants included in the study.

: The ethical committee of the Internal Medicine Department, Kasr Al-Ainy School of Medicine, Cairo University approved this work.