“…The timeframe for data collection ranged from 20 days to 18 months. For the cost calculation, most studies used medical records [ 32 – 35 , 38 , 45 , 47 – 49 , 54 – 57 , 63 ] or questionnaires and interviews [ 33 – 39 , 43 – 45 , 50 , 64 ]. Additional sources were price lists [ 41 , 46 , 47 , 49 , 51 , 54 , 57 – 59 , 62 ], facility records [ 34 , 39 – 41 , 43 , 46 , 52 , 53 , 56 , 64 ] and other literature such as studies on income in South Africa [ 59 , 65 ] or World Health Organization (WHO) reports [ 40 , 43 , 59 , 66 ].…”