Following publication of this article  the authors noticed that an incorrect probe reference was cited on page 3, 4, 5 and 6 ("UP #69, Roche Applied Science"). The correct probe that was used for the 1lox/2lox allele ratio analysis in the paper is as follows
Probe for 1lox/2lox allele quantification:
(uppercase letters = LNA bases)
Manufacturer: EUROGENTEC, Seraing, Belgium
All other information and reaction conditions in the paper are correct as stated.