https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13957889Edit ImageSaveSaveEditCropCustom TextA quack-doctor examining a urine flask. Oil painting.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 1200 x 1164 px | 300 dpiLarge JPEG 3500 x 3396 px | 300 dpiBest Quality JPEG 4250 x 4124 px | 300 dpiFree DownloadA quack-doctor examining a urine flask. Oil painting.More