ARSL and X-linked chondrodysplasia punctata 1: For example, the GDR for ARSL and X-linked chondrodysplasia punctata 1 is well defined in the literature, with variants in at least 50 probands in 7 publications scored in this curation,23, 24, 25, 26, 27, 28, 29 maxing out the genetic evidence at 12 points and reaching a Definitive classification, but it has no model organism.