In ancient China, spring rains were called "as precious as oil" for their vital role in nature's spring revival. Today, a unique climate phenomenon known as "spring persistent rainfall" (SPR) prevails ...
Frost CA, Green AC, Williams GM .The prevalence and determinants of solar keratoses at a subtropical latitude. Br J Dermatol. 1998 Dec;139(6):1033-9 10. Salasche SJ.Epidemiology of actinic ...