Angiogenic stimuli and endoglin absence induces brain arteriovenous malformations: are local endoglin deletion and angiogenesis the 'second hit' that is necessary for arteriovenous malformations formation in HHT-1?

Angiogenic stimuli and endoglin absence induces brain arteriovenous malformations: are local endoglin deletion and angiogenesis the 'second hit' that is necessary for arteriovenous malformations formation in HHT-1?