p17 Under lamellar body count, should read "blood contamination increases the LBC count, and meconium decreases it"
p 154 the most commonly gene affected is ankyrin; whereas in the Companion on p166 the answer to the most commonly affected gene is spectrin (the answer should be ankyrin)
p 28 (column I) TSH paragraph reads "TSH is elevated in true hypothyroidism and elevated in hypothyroidism"
p 154 stomatocytic type of HE confers resistance to P falciprum and P vivax.
☀: Da Costa L, et al, Hereditary spherocytosis, elliptocytosis, and other red cell membrane disorders, Blood Rev (2013), http://dx.doi.org/10.1016/j.blre.2013.04.003