Analysis of microarray public data of MM patients (datasets GSE2658, GSE6477 available at http://www.ncbi.nlm.nih.gov/geo/) indicates that a significant positive correlation exists between PVR and chemokine receptor expression, CXCR1 (R  =  0.335 in Hanamura MM Dataset of R2 platform for genomic analysis) and CXCR2 (R  =  0.239 in Chng MM Dataset of R2 platform for genomic analysis (Figure S3A,B). The gene discussed is CXCR1; the disease is Miyoshi myopathy.