Key points are not available for this paper at this time.
1Prosthetic Centre, Budrio, Italy Correspondence: H. Schmidt, I.N.A.I.L. Prosthetic Centre, Officina Ortopedica per Invalidi del Lavoro, Vigorso di Budrio, Bologna, Italy 1 Previously published in Medizinsch-Orthopadische Technik. 2/75, 31-33.
Henning Schmidt (1977) studied this question.