https://www.prognyx.com/blog/astrazeneca-s-cldn18-2-adc-won-a-late-stage-trial-with-a-caveat-and-the-caveat-iPrognyxen2026-07-28AstraZeneca's CLDN18.2 ADC won a late-stage trial "with a caveat" — and the caveat is undisclosed