Hypokalaemic periodic paralysis type 2 caused by mutations at codon 672 in the muscle sodium channel gene SCN4A. - Sternberg,D.; Maisonobe,T.; Jurkat-Rott,K.; Nicole,S.; Launay,E.; Chauveau,D.; Tabti,N.; Lehmann-Horn,F.; Hainque,B.; Fontaine,B. (Brain, 2001)