Contributions:
This work was carried out in collaboration between all authors. Author
Wassam el din el shafey carried out the data collection and
echocardiographic studies, wrote the first draft of the manuscript, and
managed the literature searches with the contribution of author Emad Ali
Al Khoufi. Authors Wassam el din el shafey did final editing of the
manuscript and data analysis. Author Emad Ali Al Khoufi helped in
literature retrieval and data analysis. All authors have read and
approved the final manuscript.
Acknowledgements: Not applicable.