Now I'll search the medical library and PubMed in parallel for comprehensive coverage.

Excellent hits. Now I'll read the most comprehensive sources in parallel - Robbins Pathologic Basis (most detailed), Goldman-Cecil (clinical management), and Robbins Basic Pathology.

Good. Now let me get the detailed clinical section from Robbins Pathologic Basis and the Goldman-Cecil clinical management section, plus look for images.

Good. Let me get the pharmacology/treatment details from Goodman & Gilman and Katzung, plus the clinical/lab details from Goldman-Cecil and the key images.

Now let me get the full clinical picture (lab findings, stages, blood smear) from Robbins and the oral iron details from Katzung.

Excellent - I now have rich data on pathophysiology, etiology, labs, and treatment. Let me get the clinical/morphology section and look for a peripheral blood smear image.

I now have everything needed for a thorough, well-cited answer. Let me also fetch the peripheral blood smear image.