To measure or not to measure? That too is a question.
D000740:Anemia / Q000175:diagnosis; D004909:Erythrocyte Indices; D005060:Europe; D006403:Hematologic Tests / Q000266:history; D006454:Hemoglobins / Q000032:analysis; D049670:History, 17th Century; D049671:History, 18th Century; D049672:History, 19th Century; D049673:History, 20th Century
D006454:Hemoglobins