Clinical outcome measures and scoring systems used in prospective studies of port wine stains: A systematic review. oleh M Ingmar van Raath, Sandeep Chohan, Albert Wolkerstorfer, Chantal M A M van der Horst, Jacqueline Limpens, Xuan Huang, Baoyue Ding, Gert Storm, René R W J van der Hulst, Michal Heger