Contribution to authorship
DS Sahota had full access to all of the data in the study and take
responsibility for the integrity of the data and the accuracy of the
data analysis. LC Poon and DS Sahota designed the study. P
Chaemsaithong, YM Wah, SY Hui, YH Ting, KM Lam, TY Leung were
responsible for data collection and confirmation. DS Sahota analyzed the
data. WT Sin and DS Sahota were in charge of data interpretation and
writing the manuscript raft. WT Sin, LC Poon and DS Sahota made
substantial revisions to the manuscript.