Figure 1. CONSORT flow chart.
Table 1. Clinical and socio-demographic data of the NAC and placebo treatment groups
Figure 2. The time course data for the effects of NAC versus placebo at the 4 time points (shown are the estimated marginal means with standard error). t0 = baseline, t1 = 4 weeks, t2 = 8 weeks, t3 = 12 weeks.
Table 2. Effects of treatments on outcome measurements
Table 3. Side effects reported during the course of the study
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