Update file colonization.html

wiki/pages/colonization.html

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       <p>[1] Levitt MD, Furne J, Springfield J, Suarez F, DeMaster E. Detoxification of hydrogen sulfide and methanethiol in the cecal mucosa. J Clin Invest. 1999 Oct;104(8):1107-14. doi: 10.1172/JCI7712. PMID: 10525049; PMCID: PMC408582.</p>
       <p>[2] Daeffler KN, Galley JD, Sheth RU, Ortiz-Velez LC, Bibb CO, Shroyer NF, Britton RA, Tabor JJ. Engineering bacterial thiosulfate and tetrathionate sensors for detecting gut inflammation. Mol Syst Biol. 2017 Apr 3;13(4):923. doi: 10.15252/msb.20167416. PMID: 28373240; PMCID: PMC5408782.</p>
       <p>[3] Wächtler B, Citiulo F, Jablonowski N, Förster S, Dalle F, Schaller M, Wilson D, Hube B. Candida albicans-epithelial interactions: dissecting the roles of active penetration, induced endocytosis and host factors on the infection process. PLoS One. 2012;7(5):e36952. doi: 10.1371/journal.pone.0036952. Epub 2012 May 14. PMID: 22606314; PMCID: PMC3351431.</p>
+      <p>[4] Isaacson B, Hadad T, Bachrach G, Mandelboim O. Quantification of Bacterial Attachment to Tissue Sections. Bio Protoc. 2018 Mar 5;8(5):e2741. doi: 10.21769/BioProtoc.2741. PMID: 29623285; PMCID: PMC5881888.</p>
+      <p>[5] Hansen J, Mailand E, Swaminathan KK, Schreiber J, Angelici B, Benenson Y. Transplantation of prokaryotic two-component signaling pathways into mammalian cells. Proc Natl Acad Sci U S A. 2014 Nov 4;111(44):15705-10. doi: 10.1073/pnas.1406482111. Epub 2014 Oct 20. PMID: 25331891; PMCID: PMC4226098.</p>
+      <p>[6] Mazé A, Benenson Y. Artificial signaling in mammalian cells enabled by prokaryotic two-component system. Nat Chem Biol. 2020 Feb;16(2):179-187. doi: 10.1038/s41589-019-0429-9. Epub 2019 Dec 16. PMID: 31844302; PMCID: PMC6982536. </p>
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