Various time intervals in patients treated within the same institution (mother-ship) vs. those who were transferred from another before (ship and drip) or after (drip and ship) IV tPA therapy. (CTA: CT angiogram, ED: emergency department, IA: start of endovascular therapy, ID: thrombus identification, IV tPA: intravenous tPA, Puncture: groin puncture; Rand: randomization).