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Sinus frontalis in red. Paranasal sinuses Zatoki przynosowe Nasennebenhhlen Nnhfront svg UTC Nnhfront svg myself derivative work kimmel talk Sinus frontalis in red kimmel Nnhfront svg PDUSGov Original upload log This image is derivative work of the following images File Nnhfront svg with Ccpdmarkfooter PDUSGov Mik Bytes no derived