HVP, HTMD and TTTP contributed to the collection, entry, analysis and interpretation of data.
TE participated in the design of this study, carried out all data entry, analysis, and interpretation, and drafted the manuscript.
AM was the research manager and was responsible for data collection, data entry, analysis and interpretation and drafting the publication and assisted in developing research protocols and questionnaires.
JJB conceived the study and was the primary contributor to study design, data entry, analysis and interpretation and manuscript drafting and review.
KDJ participated in all phases of the study, including study design; oversight of MS students; data collection, entry, analyses and interpretation; and final manuscript preparation.
Field notes and memos were also used to facilitate reflexivity and the interviewers met frequently to ensure the consistency of the processes of interview, data entry, coding and interpretation of the data.
This made us revise the whole database and the questionnaire to reconfirm that it was the only problem with data entry and the interpretation of questions.
After travel, the diary was checked for entry gaps and interpretations by a nurse in the participant's presence.
BA has made substantial contributions in the design, data collection, data entry, data analysis and interpretation of results.
NA contributed through data collection, data entry, data analysis and interpretation, and drafting of the article.
