Reply

The authors of the study "The effect of platelet-rich plasma on female androgenetic alopecia: A randomized controlled trial" responded to comments from Kim et al. They defended their use of 50x and 100x magnification for measuring hair density and caliber, respectively, based on other trichographic literature. They emphasized the importance of standardization in photography for evaluating hair density and caliber, and noted that they used consistent lighting, hairstyling, and photography systems throughout their study. They also used a single investigator to manually count hair density on each magnified image, arguing that manual counting is more accurate than automatic counting. They agreed with Kim et al that standardized and consistent clinical photography is necessary to accurately evaluate the efficacy of various androgenetic alopecia therapies.