@inproceedings{PfingstenBorgettoTomlinetal.2021, author = {Andrea Pfingsten and Bernhard Borgetto and George S. Tomlin and Susanne Max and Claudia Trickes}, title = {The Research Pyramid. Establishing the value of evidence from multiple research approaches in a systematic review}, booktitle = {World Physical Therapy Congress der World Confederation for Physical Therapy (WCPT), Amsterdam, 2011}, url = {https://www.researchgate.net/publication/258206656}, year = {2021}, }