Animals were housed in pathogen-free conditions according to the recommendations of the Federation of European Laboratory Animal Science Association. All animal experiments were approved by Stockholms djurförsöksetiska nämnd (ethical permit no. N243/14, N116/16 and 14051-2019). Id1 floxed mice have been previously described (Nam and Benezra, 2009 (link)), and Swiss mice were ordered (Janvier Labs) for in utero lentiviral injections with shRNAs.
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