Neo-oogenesis: Has its existence been proven?

Neo-oogenesis: Has its existence been proven?

It was long believed that mammals are born with a fixed number of primordial follicles, each of which encloses an oocyte arrested at the diplotene step of meiotic prophase. Arising at or after birth, small numbers of primordial follicles become activated each day and enter a folliculogenic growth phase during which follicles either degenerate by atresia or complete maturation, resulting in ovul...

Has Quantum cryptography been proven secure?

Quantum cryptography asserts that shared secrets can be established over public channels in such a way that the total information of an eavesdropper can be made arbitrarily small with probability arbitrarily close to 1. As we will show below, the current state of affairs, especially as it pertains to engineering issues, leaves something to be desired. keywords: Quantum cryptography, Reconciliat...

Prophylaxis and aspergillosis--has the principle been proven?

Does it help that efficacy has been proven once we start discussing (added) benefit?

Since the introduction of benefit assessment to support reimbursement decisions in Germany there seems to be the impression that totally distinct methodology and strategies for decision making would apply in the field of drug licensing and reimbursement. In this article, the position is held that, while decisions may differ due to differing mandates of drug licensing and reimbursement bodies, t...

Acute pulmonary thromboembolism: has its evolution been redefined?

Natural History Statistics Older statistics estimate that in the United States, acute pulmonary thromboembolism afflicts 500 000 to 600 000 persons annually and is either a primary or secondary cause of death in 150 000 to 200 000 of these individuals.1,2 Extrapolation of a population-based study from data accumulated in 1985 through 1986 in Worcester, Mass, suggests that each year there are '1...