I am co-PI (with Chris Dye) of the Bill and Melinda Gates Foundation funded TB Modelling and Analysis Consortium (TB-Mac). The Consortium aims to improve global TB control by coordinating and promoting mathematical modelling and other quantitative research relevant to support evidence-based policy making and implementation. One of the three meetings we will convene will be on TB Drugs (Sept 2013). As such I will find it very useful to be a member of this working group, and should be able to contribute to its activities.