“…A total of 6 studies reported national data, 32,43–45,60,61,65 12 reported provincial, state or county data, 13,29,30,33,35,36,41,42,51,52,55,56,59,64 9 reported regional data, 26,34,39,46,48,49,57,58,63 7 reported a single town or health service/practice, 31,37,40,47,50,53,54 and 1 reported that data set was multi-regional. 10,38 Eight studies were described as rural or semi-rural, 26,31,47,48,50,57,58,61 one regional 39 and the remainder were cross-sectional containing rural data. One study reported data from non-cancer patients, 46 eight both malignant and non-malignant, 36,38,39,40,50,52,59,61 8 cross-sectional population data 35,42–…”