The MALATANG survey: The L GAS–L IR correlation on sub-kiloparsec scale in six nearby star-forming galaxies as traced by HCN J = 4 → 3 and HCO+ J = 4 → 3 by Tan, Q-H, Gao, Y, Zhang, Z-Y, Greve, TR, Jiang, X-J, Wilson, CD, Yang, C-T, Bemis, A, Chung, A, Matsushita, S, Shi, Y, Ao, Y-P, Brinks, E, Currie, MJ, Davis, TA, Grijs, RD, Ho, LC, Imanishi, M, Kohno, K, Lee, B, Parsons, H, Rawlings, MG, Rigopoulou, D, Rosolowsky, E, Bulger, J, Chen, H, Chapman, SC, Eden, D, Gear, WK, Gu, Q-S, He, J-H, Jiao, Q, Liu, D-Z, Liu, L, Li, X-H, Michałowski, MJ, Nguyen-Luong, Q, Qiu, J-J, Smith, MWL, Violino, G, Wang, J-F, Wang, J-F, Wang, J-Z, Yeh, S, Zhao, Y-H, Zhu, M