1. From INSERM Unité 581, Hôpital Henri Mondor, Créteil (M.C., A.A., A.N., C.A., B.A.-M., M.B.-B., C.P., F.P.), INSERM Unité 466, CHU Rangueil, Toulouse (N.A.-A., T.L.), and Ecole Superieure d’Ingenieurs en Electrotechnique et Electronique, Noisy-Le-Grand (F.R.), France. Dr Nawrocki is now at the Medical Academy of Bialystok, Department of Physiology, Bialystok, Poland.