1) Cook IJ et al. Gastrointestinal investigation of iron deficiency anaemia. BMJ 1986;292:1380.
2) Dawson AA et al. Evaluation of diagnostic significance of certain symptoms and physical signs in anaemic patients. BMJ 1969;3:436.
3) Sheth TN et al. The relation of conjunctival pallor to the presence of anemia. J Gen Intern Med 1997;12:102.
4) Nardone DA et al. Usefulness of physical examination in detecting the presence or absence of anemia. Arch Intern Med 1990;150:201.
5) Gjorup T et al. A critical evaluation of the clinical diagnosis of anemia. Am J Epidemiol 1986;124:657.