Fig. 1From: Expression of calcitonin gene-related peptide in the infrapatellar fat pad in knee osteoarthritis patientsImmunostaining of CGRP in the infrapatellar fat pad and synovial tissue of knee OA patients. Infrapatellar fat pad (a–c) and synovial tissue (d–f) stained with (a, c) DAPI (nuclei) or (b, d) CGRP. c, f The merged images. Scale bar = 100 μmBack to article page