Observation:Prid:Pt:Tiss:Nom:Churukian-Schenk stain
observation:prid:pt:tiss:nom:churukian-schenk stain
Observation:Prid:Pt:Tiss:Nom:Churukian-Schenk stain
observation:prid:pt:tiss:nom:churukian-schenk stain