Reply to Brown et al: 'Correct application of variant classification guidelines in germline RUNX1 mutated disorders to assist clinical diagnosis'. Issue 1 (2nd January 2020) - Prieto-Conde, María Isabel; Labrador, Jorge; Hermida, Gerardo; Alonso, Sara; Jiménez, Cristina; García-Alvarez, María; Medina, Alejandro; Balanzategui, Ana; Alcoceba, Miguel; Sarasquete, María Eugenia; Puig, Noemí; González, Verónica; et al.