Fig. 3From: Relationship between freshwater harmful algal blooms and neurodegenerative disease incidence rates in South KoreaHeatmaps of average concentrations of chlorophyll-a (a), the average adjusted numbers of MND patients (b), AD patients (c), and PD patients (d) in a 1-km grid. Data are visualized here using the last three years of the study period (2015–2017)Back to article page