[1] Liverpool Univ Hosp NHS Trust, Dept Trauma & Orthopaed, Liverpool L69 3BX, England
[2] Univ Liverpool, Sch Med, Liverpool L69 3BX, England
[3] Alexandria Univ, Fac Med, Alexandria 21500, Egypt
[4] Milton Keynes Univ Hosp NHS Fdn Trust, Dept HIV & Blood Borne Virus, Milton Keynes MK6 5LD, England
[5] Milton Keynes Univ Hosp NHS Fdn Trust, Dept Trauma & Orthopaed, Milton Keynes MK6 5LD, England
[6] Milton Keynes Univ Hosp NHS Fdn Trust, Dept Geriatr Med, Milton Keynes MK6 5LD, England
[7] Univ Buckingham, Fac Med & Hlth Sci, Buckingham MK18 1EG, England
[8] Milton Keynes Univ Hosp NHS Fdn Trust, Dept Med, Milton Keynes MK6 5LD, England
[9] Milton Keynes Univ Hosp NHS Fdn Trust, HIV Metab Clin, Milton Keynes MK6 5LD, England