Observation:Prid:Pt:Bone mar:Nom:Oil red O stain
observation:prid:pt:bone mar:nom:oil red o stain
Observation:Presence or Identity:To identify measures at a point in time:Marrow (bone):Nominal:Oil red O stain
observation:presence or identity:to identify measures at a point in time:marrow (bone):nominal:oil red o stain