From l.: PatientPoint's Linda Ruschau, Novartis' Angelica Aguirre, IPG Mediabrands' Melissa Gordon-Ring and Ad Age's John Dioso at the Point of Care Upfront in New York on May 13. (David Teng/PatientPoint)
WPP Media has issued a report attacking the quality of desktop and mobile inventory sold via Publicis Groupe's Epsilon SSP, a rarity even among industry rivals.