Fig. 1. Large-scale multicenter smear samples collection based on the TBS standard.
a The number of retrospective smears of different preparation and staining protocols collected from multiple medical institutions (n = 81,727). b The number of prospective smears of different preparation and staining protocols collected from multiple medical institutions (n = 34,403). c The smear number of different TBS classification in the retrospective study. d The smear number of different TBS classification in the prospective study.