Fig. 3From: Using the Kulldorff’s scan statistical analysis to detect spatio-temporal clusters of tuberculosis in Qinghai Province, China, 2009–2016The seasonal distribution of monthly TB incidents, between years of 2009 and 2016, in Qinghai, China. a: Time-series of monthly TB incidents; b: A seasonal trend was decomposed from the time-series of TB incidents; c: A long-term trend was decomposed from the time-series of TB incidents; d: The residual data after excluding of seasonality and a long-term trend; e: Estimated seasonal index of 12 months ranged from 0.80 to 1.23, and the maximum value was recorded in MarchBack to article page