Singapore Med J 2015; 56(2): e26–e28; http://dx.doi.org/10.11622/smedj.2015030

On page e27, the normal range for carboxyhaemoglobin should have been 0%–10%, and the suggested ranges for non-smokers and smokers are 0%–2% and 0%–10%,(1–3) respectively.

Table I

Laboratory test results of the patient.

References
Buchelli Ramirez H, Fernández Alvarez R, Rubinos Cuadrado G, et al. [Elevated carboxyhemoglobin: sources of carbon monoxide exposure]. Arch Bronconeumol. 2014;50:465-8. English, Spanish.
Hampson NB, Hauff NM. Carboxyhemoglobin levels in carbon monoxide poisoning: do they correlate with the clinical picture?. Am J Emerg Med. 2008;26:665-9.
Dolan MC. Carbon monoxide poisoning. CMAJ. 1985;133:392-9.