The phrase "although protracted" is correct and usable in written English.
It can be used to indicate that something is prolonged or extended in duration, often in contrast to an expectation of brevity.
Example: "The negotiations were challenging, although protracted, they ultimately led to a successful agreement."
Alternatives: "even if lengthy" or "despite being drawn out".
The eosinophilic diseases are particularly responsive to oral CCSs, although protracted courses are avoided and shorter courses only provide temporary relief.
Although protracted cognitive impairment has been reported to occur after radiotherapy even when such therapy is not directed to brain areas, the mechanism remains unclear.
Similarly, weekly irinotecan dosing was used because of a limited free drug supply, although protracted dosing schedules are commonly used in pediatric trials [ 9, 18].
An account of Kingsolver's foray into turkey husbandry seems protracted, although it does set up a suitably moving and celebratory conclusion.
Although the journey is overly protracted, it is swept along by Cook's artistry, his insights into broken people, his austere imagery of the barren landscapes that attract them.
In one study, PFOS was shown to impair cerebellar Purkinje cell function in vitro; although this did not involve protracted effects or neurodevelopment, it pointed out the potential for direct actions of perfluorinated chemicals on neuronal cells (Harada et al. 2006).
Although "Herman's House" inveighs against protracted solitary confinement as cruel and unusual punishment, it doesn't delve deeply into the legal and human rights implications of an issue that has become a hot topic.
In older patients the prognosis is still poor although the clinical course may be protracted [ 1].
Although database and manual searching was protracted and extensive, it is possible that not all relevant studies were found due to the poor indexing and inconsistent terminology for this topic.
Although the region emerged this spring from a painfully protracted double-dip recession, the recovery is expected to be a feeble one.
Martynov's "Vita Nuova" turned out to be an excruciatingly protracted excursion through other people's musical ideas, although the composer's knowledge of Russian Orthodox chant produced moments of austere beauty.
