The late Proterozoic — the time
period beginning less than a billion years ago following this remarkable chapter of sustained low levels of oxygen — was strikingly
different, marked by extreme climatic events manifest in global - scale glaciation, indications of
at least
intervals of modern - like oxygen abundances, and the emergence and diversification of the earliest animals.
S. 8 of the MIG provides for 3
different stages for treatment over a 12 - week
period, allowing for discharge by the health care practitioner
at any of the 4 week -
intervals if maximal recovery is achieved.