A new drug for Migraine prevention was released.
People complain because it was tested in 666 patients.
Then they tested one more. Research went back 3 months.
People stopped complaining.
source: https://www.medscape.com/viewarticle/897461?src=WNL_infoc_180713_MSCPEDIT_TEMP2&uac=223711AN&impID=1683226&faf=1