Duchenne muscular dystrophy (DMD). which afflicts 1 in 3500 boys. is one of the most common genetic disorders of children. This fatal degenerative condition is caused by an absence or deficiency of dystrophin in striated muscle. https://www.roneverhart.com/Antelope-Audio-Edge-Quadro-Double-Diaphragm-Dual-Membrane-Condenser-Microphone-p16990/