https://www.reuters.com/article/us-theranos-holmes/theranos-founder-elizabeth-holmes-takes-stand-in-fraud-case-idUSKBN2I420R >SAN JOSE, Calif. (Reuters) -Theranos founder Elizabeth Holmes took the stand on Friday to defend herself against charges of defrauding investors and patients about the now-defunct blood-testing startup once valued at $9 billion.