Roger Perlmutter, 2016 Institute for Systems Biology via Youtube

King Keytru­da floun­ders in an­oth­er piv­otal can­cer study. And that may spur doubts about Mer­ck­'s stay­ing pow­er

The king of the PD-(L)1 class is see­ing a few cracks start to ap­pear in the crown.

Mer­ck re­port­ed Tues­day evening that its Phase III …

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