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. 2011 Feb;162(4):851–862. doi: 10.1111/j.1476-5381.2010.01090.x

Table 1.

Number of animals used in each experiment

Parameters Plac + Veh + Nx Plac + AS30 + Nx Morph + Veh + Nx Morph + AS30 + Nx Total n
Number of rats at the beginning of the experiment = 33 7 7 9 10
Somatic signs of opiate withdrawal 6 5 8 9 28
ACTH levels 5 6 9 10 30
Corticosterone levels 5 6 8 8 27
MHPG, NA and NA turnover 4 6 5 10 25
TH pSer31-IR 6 6 5 5 22
TH pSer40-IR 5 6 4 6 21
CRF2-IR 7 6 13

ACTH, adrenocorticotropic hormone; NA, noradrenaline; MHPG, 3-methoxy-4-hydroxyphenylethylen glycol; TH, tyrosine hydroxylase; Veh, vehicle; Nx, naloxone; Plac, placebo; Morph, morphine.