Pediatric chronic pain grading: a revised classification of the severity of pediatric chronic pain
S. Grothus, A. Sommer, L. Stahlschmidt, G. Hirschfeld, L. Höfel, R. Linder, B. Zernikow, J. Wager, Pain 165 (2024) 2087–2097.

Efficacy of adding interoceptive exposure to intensive interdisciplinary treatment for adolescents with chronic pain: a randomized controlled trial
F. Flack, L. Stahlschmidt, M. Dobe, G. Hirschfeld, A. Strasser, J. Michalak, J. Wager, B. Zernikow, Pain 159 (2018) 2223–2233.

Variability of 'optimal' cut points for mild, moderate, and severe pain: Neglected problems when comparing groups.
G. Hirschfeld, B. Zernikow, Pain 154 (2013) 154–159.

Developmental and sex differences in somatosensory perception-a \'74extitsystematic comparison of 7- versus 14-year-olds using quantitative sensory testing
M. Blankenburg, D. Meyer, G. Hirschfeld, N. Kraemer, T. Hechler, F. Aksu, E.K. Krumova, W. Magerl, C. Maier, B. Zernikow, Pain 152 (2011) 2625–2531.