On 2017 Sep 21, David Mage commented:

The NEUROKININ 1 RECEPTOR, a.k.a NK1R SUBSTANCE P RECEPTOR and TACR1, has a cytogenetic location on autosome 2 (2p12). The authors report in Table 1 that their 55 "SIDS" cases were 33 male and 22 female, apparently not noticing that the male fraction of 0.60 they do not report, is virtually identical to the SIDS male fraction of almost all SIDS cohorts pooled together. It has been claimed (PMID 5129451) that such consistency must be related to a recessive X-linkage that doesn't exist for this NK1R receptor.

On 2017 Sep 21, David Mage commented:

The NEUROKININ 1 RECEPTOR, a.k.a NK1R SUBSTANCE P RECEPTOR and TACR1, has a cytogenetic location on autosome 2 (2p12). The authors report in Table 1 that their 55 "SIDS" cases were 33 male and 22 female, apparently not noticing that the male fraction of 0.60 they do not report, is virtually identical to the SIDS male fraction of almost all SIDS cohorts pooled together. It has been claimed (PMID 5129451) that such consistency must be related to a recessive X-linkage that doesn't exist for this NK1R receptor.