[1] Univ East London, Sch Hlth Sport & Biosci, Dept Allied & Publ Hlth, London E16 2RD, England
[2] Medway NHS Fdn Trust, Dept Anaesthet, Gillingham ME7 5NY, England
[3] York St John Univ, York YO31 7EX, England
[4] Arden Univ, Sch Hlth & Care Management, Arden House,Middlemarch Pk, Coventry CV3 4FJ, England
[5] Natl Eye Hosp, Colombo 01000, Sri Lanka
[6] Tung Wah Coll, Sch Nursing, Hong Kong, Peoples R China
[7] Ladoke Akintola Univ Technol, Dept Med & Surg, Ogbomosho, Nigeria
[8] Canterbury Christ Church Univ, Fac Med Hlth & Social Care, Canterbury CT1 1QU, England
[9] Kings Coll London, Sch Canc & Pharmaceut Sci, London WC2R 2LS, England
[10] Univ Kent, Medway Sch Pharm, Canterbury CT2 7NZ, England
[11] Medway NHS Fdn Trust, Dept Surg, Gillingham ME7 5NK, England
[12] AELIA Org, Thessaloniki 57001, Greece