The methodological quality of clinical trials of physical therapy for low back pain varies between countries with different income levels. A meta-epidemiological study Carlos Maximiliano Sánchez Medina; Claudia Gutiérrez Camacho; Anne M. Moseley; Xochiquetzalli Tejeda Castellanos; Qiuzhe Chen; Edgar Denova-Gutiérrez; Aidan G Cashin; Viridiana Valderrama Godínez; Akari Fuentes Gómez; Ana Elisabeth Olivares Hernández; Giovanni E. Ferreira;

Transcutaneous electrical nerve stimulation and heat to reduce pain in a chronic low back pain population: a randomized controlled clinical trial Lynn Leemans; Ömer Elma; Jo Nijs; Timothy H. Wideman; Carolie Siffain; Hester den Bandt; Sven Van Laere; David Beckwée;

A content analysis of online information about the benefits and harms of spine surgery Giovanni E. Ferreira; Joshua Zadro; Mary O'Keeffe; Meilin Chen; Yiyi Gao; Ziqi Hu; Ziyun Zhang; Ian A. Harris; Chris G. Maher;