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Relative expression (
× 1000) of CNR1, CNR2 and GPR55 gene transcripts in human bronchi (n = 12). HPRT1, GAPDH and GUSB were used as housekeeping genes for the normalization of data (Livak and Schmittgen, 2001). Data are shown for each individual and as mean ± SEM. *P < 0.05; **P < 0.01.
