(b)(4).Concomitant medical products: vanguard xp femoral, cat#: 195214, lot#: 990240; vanguard xp tibial bearing, cat#: 195367, lot#: 677800; vanguard xp tibial bearing, cat#: 195437, lot#: 825590.Customer has indicated that the product will not be returned to zimmer biomet for investigation, as product location is unknown.The investigation is in process.Once the investigation has been completed, a follow-up mdr will be submitted.If any further information is found which would change or alter any conclusions or information, a supplemental will be filed accordingly.Zimmer biomet will continue to monitor for trends.Multiple mdr reports were filed for this event, please see associated reports: 0001825034 - 2017 - 07574, 0001825034 - 2017 - 07576, 0001825034 - 2017 - 07577.Product location is unknown.
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