1. Formaldehyde concentration in diagnostic patch testing: comparison of 1% with 2%;Trattner;Contact Dermatitis,1998
2. Routine diagnostic patch-testing with formaldehyde 2·0% (0·60 mg cm-2) may be an advantage compared to 1·0%;Hauksson;Acta Derm Venereol,2010
3. Clinically relevant contact allergy to formaldehyde may be missed by testing with formaldehyde 1·0%;Hauksson;Br J Dermatol,2011