Theranos needs to prove that a blood sample oozing from an open wound (a finger prick) is in any way comparable to sterile blood extracted directly from a vein. They also need to show that analyzing a diluted and contaminated blood sample with the Siemens instrument produces an accurate result.

At this point, I think we should assume that because Theranos won't publish any studies about the scientific foundations of their work in peer-reviewed journals or preprint sites, they have nothing of value to show us.