“…Previous studies have revealed the links between ambient temperature change and diseases, in both cold and hot weather [ 1 , 2 , 3 , 4 ]. The exposure to ambient temperature is one of the important determinants of disease burden [ 5 ], mortality and morbidity [ 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 ]. Moreover, some studies find the relationship between ambient temperature and morbidity is not linear, but a U-, V- or J-shaped pattern [ 16 , 17 , 18 , 19 ].…”