k) Neurological contra-indication to vincristine (e.g. pre-existing diabetic neuropathy >grade 1) l) Major surgery for any reason, except diagnostic biopsy, within 4 weeks of enrolment and/or if the subject has not fully recovered from the surgery within 4 weeks of enrolment m) Any other serious active disease, including but not limited to; i) pregnancy or lactation, ii) clinically significant (i.e., active) cardiovascular disease: cerebral vascular accident/stroke (< 6 months prior to enrolment), myocardial infarction (< 6 months prior to enrolment), unstable angina pectoris, congestive heart failure (New York Heart Association Classification Class ≥ II), or serious cardiac arrhythmia requiring medication (including QTc prolongation of > 470 ms and/or pacemaker) or prior diagnosis of congenital long QT syndrome.