Illustration Acid Tumors (image) Karolinska Institutet Caption Low pH in tumours counteracts the desired effect of the drug chloroquine, shows a paper in the journal Autophagy by Angelo De Milito and colleagues. Credit Paola Pellegrini Usage Restrictions This illustration may only be published / reproduced in connection to media reports about the research of Angelo De Milito. For further informatione, please contact the press office of Karolinska Institutet, Sweden. Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.