Text and Data Mining valid from 2019-01-04
Received: 11 November 2018
Accepted: 19 December 2018
First Online: 4 January 2019
Compliance with ethical standards
: All participants gave their informed consent in writing after the study aims and procedures were carefully explained to them in their own language. Collaborative study was approved by the ethical review boards of the University of Health Sciences Lahore Pakistan and China Medical University, Shenyang Liaoning Province, People’s Republic of China and in accordance with the standards of the Declaration of Helsinki.
: The authors declare that they have no conflict of interest.