Reply to "Motor cortex plasticity in subjects with mild cognitive impairment". Issue 6 (June 2016) - Lahr, Jacob; Peter, Jessica; Minkova, Lora; Lauer, Eliza; Reis, Janine; Heimbach, Bernhard; Hüll, Michael; Normann, Claus; Nissen, Christoph; Klöppel, Stefan