This image was adapted from a picture posted to publicdomainq.net. All of the images on these sites are in the public domain i.e. CC0. This site is only in Japanese but can be easily navigated with Google Translate.
醫學醫生 - 男人，用聽診器，說話
advice、ambulance、Comic characters、cure、doctor、eyeglasses、glasses、health、hospital、injury、male、man、medical、medicine、publicdomainq.net、smile、stethoscope、talking、tie、work
忠告、救護車、漫畫人物、治愈、醫生、眼鏡、眼鏡、健康、醫院、傷、男、人、醫、醫學、public domain Q.net、微笑、聽筒、說、貼、工作
資料來源：openclipart ( https://openclipart.org/ )