Fig. 7.

Forest plots of incidence studies above and below 55.6^oN latitude. 39 studies [15–53] and their incidence statistics are listed individually and arranged in order of decreasing latitude, separated into 13 publications North of 55.6^oN [16, 26, 28, 30, 33, 34, 36, 38–40, 43, 44, 50], which were exclusively Scandinavian, and 26 remaining Equatorial publications. Summary rates for the groups are noted