DAG1 and muscular dystrophy-dystroglycanopathy, type A: In the group of alpha-dystroglycan related dystrophies, the authors include a) CMD with partial merosin deficiency (MDC1B with locus in 1q42); b) LARGE related CMD (MDC1D—gene LARGE); c) Fukuyama CMD, FCMD gene, protein Fukutin; d) Muscle-Eye-Brain (MEB) genes POMGnTI, FKRP, ISPD, TMEM5, Fukutin); e) Walker-Warburg syndrome (WWS), genes POMTI, POMT2; FKRP, ISPD, CTDC2, TMEM5, POMGnTI, B3GALNT2, GMPPB, B3GNT1, SGK196, Fukutin); e) CMD/LGMD with Mental Retardation (genes FKRP, POMTI, POMT2, ISPD, GMPPB); f) CMD/LGMD without mental retardation including MDC1C (genes FKRP, ISPD, GMPPB, Fukutin).