‡ No purchase necessary. This promotion is available only to customers in Armenia, Azerbaijan, Belarus, Georgia, Kyrgyzstan, Kazak, Moldova, Russian Federation, Tajikistan, Turkmenistan, Ukraine, Uzbekistan who currently use human pluripotent stem cells in their research and plan to use the sample within 4 weeks. Sample requests must be received by March 31, 2019, or until sample supplies are depleted, whichever comes first. Limit one free sample per customer. The sample includes one StemFlex Medium kit (450 mL basal medium, 50 mL supplement). Cannot be combined with other discounts or promotions. Offer void where prohibited, licensed or restricted by federal, state, provincial, or local laws or regulation or agency/institutional policy. Other restrictions may apply.