The phrase "protracted course" is correct and can be used in written English.
This phrase is typically used to describe a lengthy or extended period of time or process. For example: "The patient's illness followed a protracted course, lasting over six months." "The negotiation process was a protracted course, taking over a year to reach an agreement." "The protracted course of the project caused delays and increased costs."
In other patients the disease has a more chronic and protracted course.
It is the most common type of cutaneous T-cell lymphoma (CTCL), characterised by a typically slow evolution and protracted course.
This protracted course of dementia makes it difficult for persons with dementia and their families, as well as for professionals to discuss end-of-life issues, such as advance treatment decisions, preferred place of care and death or lasting power of attorney [ 2, 4, 5].
These are characterized by a more gradual onset and a more protracted course.
Not by one stupid action, but by a protracted course of dishonesty".
Passing sentence, Mr Justice Saunders said Lord Taylor had thrown away his many positive achievements in public life "not by one stupid action but by a protracted course of dishonesty".
When he passed sentence, Mr Justice Saunders said Lord Taylor had thrown away his many positive achievements in public life "not by one stupid action but by a protracted course of dishonesty".
He was hospitalized for a year, barely avoided a lobotomy thanks to the treating doctor's battle with his superiors, underwent a protracted course of electroshocks and resumed the climb.
The 58-year-old former barrister, the first parliamentarian to stand trial over expenses, had pursued a "protracted course of dishonesty" and lied to the jury on oath, the judge, Mr Justice Saunders, said when passing sentence at Southwark crown court.
Some regional functional specializations emerge within the first months after birth, while others have a more protracted course of development spanning over the first decade or longer.
The detection of myelin disruptions in Alzheimer's disease (AD affected brain raises the possibility that oligodendrocytes undergo pathophysiological assault over the protracted course of this neurodegenerative disease.
