External validation of the smartphone-based 6-minute walking test in patients with degenerative lumbar disorders undergoing epidural steroid injection by Michal Ziga, MD, Martin N. Stienen, MD/FEBNS, Anna Maria Zeitlberger, MD, Stefanos Voglis, MD, Luca Regli, MD, Oliver Bozinov, MD, Nicolai Maldaner, MD

Get full text