... populations in the UK [19 , 21, 24], Ireland [20,23], the Netherlands[22,26] and, more recently, Iran [25]. None of these sub-sequent studies, however, re-examined the internal factorstructure of the ... design of the study, dataanalysis and preparation of the manuscript. All authorscontributed to the preparation of the manuscript and read and approved the final manuscript.References 1. Atlas: ... conducted the data analysis and prepared a draft of the manuscript. FK designed the study and collected the data. RM participated in the preparation and revision of the manuscript. JP supervised the...