Erratum: Request to Include COA Number Beta-Expansin of Bermuda, Johnson, and Para grass pollens, is a major cross-reactive allergen for allergic rhinitis patients in subtropical climate.

COA number for ethical approval should be included in Methods part as follows: Methods Patients The study was approved by the Institutional Review Board, Siriraj Hospital (SiEc 100/2012, COA no. Si 315/2012). Forty patients with history of AR were recruited. All patients signed an informed consent before SPT. Thirty-one of them were excluded due to mono -sensitization to grass allergen. Nine patients, aged 9-47 years old (mean 26.3 ± 4 years), were included in this study based on positive SPT (mean wheal diameter, MWD ≥ 3 mm) to protein extract from at least 2 of 3 BGP, JGP, and PGP. The SPT extracts were prepared as described previously.4 Determination of level of serum sIgE against extract of BGP and JGP was carried out by ImmunoCAP (Phadia, Uppsala, Sweden). However, there is no available test for PGP.