The first symptoms often appear a month or two after birth. The babies' muscles stiffen.stiffen: (…を)(…で)かたくする、こわばらせる、硬直させる、体をこわばらせる、固練りにする、どろどろにする、硬化させる、堅苦しくする They lose their heari…

U.K.A clinical trial investigating a treatment for blindness is under way this winter to evaluate the safety and efficacy of replacing diseased eye cells with stem cells.efficacy: 効能(のあること)、効き目 U.S.Following a federal court hear…