[1] Univ East London, Sch Hlth Sport & Biosci, Dept Allied & Publ Hlth, London, England
[2] Hamad Bin Khalifa Univ, Qatar Fdn, Coll Sci & Engn, Div Sustainable Dev, Doha, Qatar
[3] Univ Ibadan, Dept Nursing, Ibadan, Oyo, Nigeria
[4] Tung Wah Coll, Sch Nursing, Hong Kong, Peoples R China
[5] Ladoke Akintola Univ Technol, Dept Paediat & Child Hlth, Osogbo, Nigeria
[6] Epsom & St Helier Univ Hosp NHS Trust, Endoscopy Unit, Carshalton, England