Comparison of the efficacy between topical timolol and pulsed dye laser in the treatment of ulcerated infantile haemangiomas: a randomized controlled study. (21st December 2020) - Chen, Q.Y.; Chang, L.; Qiu, Y.J.; Ying, H.R.; Chang, S.J.; Zhang, Y.; Chen, Z.A.; Ma, G.; Lin, X.X.