Kosikowska U, Stepien-Pysniak D, Ozga D, Wernicki A, Malm A. Identification of Bacillus spp. colonizing the nasal mucosa of healthy adults living in the suburban area using the matrix-assisted laser desorption-ionization time-of-flight mass spectrometry (MALDI-TOF MS) system. Curr. Issues Pharm. Med. Sci. 2015;27(3):137-141. doi:10.1515/cipms-2015-0001