Erratum: Double Etched Porous Silicon Films for Improved Optical Sensing of Bacteria [J. Electrochem. Soc., 164, B581 (2017)]. Issue 9 (1st January 2018) - Gongalsky, M. B.; Koval, A. A.; Shevchenko, S. N.; Tamarov, K. P.; Osminkina, L. A.