Fig. 1From: Geographical inequality in service utilization for primary aldosteronism screening: spatial epidemiological study in Southern ThailandProvinces and the locations of tertiary and super-tertiary centers in Southern Thailand. Southern Thailand is in the 11th and 12th health service regions and comprises of 14 provinces (area code); Nakhon Si Thammarat (80), Krabi (81), Phang Nga (82), Phuket (83), Surat Thani (84), Ranong (85), Chumphon (86), Songkhla (90), Satun (91), Trang (92), Phattalung (93), Pattani (94), Yala (95), and Narathiwat (96). The map was generated by ggplot2 and other graphical packages in R software, using geographic data from DIVA-GIS (12)Back to article page