“…Over the past century, the role of the rat in medicine has transformed from carrier of contagious diseases to indispensable tool in experimental medicine and drug development. Current examples of use of the rat in human medical research include surgery 12 , transplantation [13][14][15] , cancer 16,17 , diabetes 18,19 , psychiatric disorders 20 including behavioural intervention 21 and addiction 22 , neural regeneration 23,24 , wound 25,26 and bone healing 27 , space motion sickness 28 , and cardiovascular disease [29][30][31] . In drug development, the rat is routinely employed both to demonstrate therapeutic efficacy 15,32,33 and to assess toxicity of novel therapeutic compounds before human clinical trials [34][35][36][37] .…”