Correction to: The knockdown of Neuropeptide FF receptor 2 inhibits capsaicin-induced CGRP Upregulation in mouse trigeminal ganglion (The Journal of Headache and Pain, (2020), 21, 1, (87), 10.1186/s10194-020-01152-z)

After publication of the original article [1], we were notified of a mistake in the article title. The authors have found that mice knockdown/ or knockout of NPFFR2 showed no responses to capsaicin injection, which upregulated the CGRP protein in the trigeminal ganglion. Therefore, the word “knockdown” should be added into the title to correctly represent the paper’s major findings. The correct title should read: “The knockdown of Neuropeptide FF receptor 2 inhibits capsaicin-induced CGRP Upregulation in mouse trigeminal ganglion”.