My mom 52 yr old was diagnosed with breast cancer (er/pr +ve, her2-ve) stage 4 with multiple bone mets in Jan 2016. She was started on letrozole daily since 1st week of feb and monthly zoledronic acid injection. She also took 5 radiations to the spine n rt hip for pain relief. She will be completing 3 months of letrozole in may. What should be the follow up at 3 months..does the 3 month follow up include pet scan in such pts? Or is it usually done at 6 months??