The phrase "although disputed" is correct and usable in written English.
It can be used to introduce a contrasting idea or to acknowledge that there is disagreement regarding a particular statement or claim.
Example: "The theory is widely accepted, although disputed by some experts in the field."
Alternatives: "despite being contested" or "even if challenged".
Although disputed, one study in 2004 by the Partnership for the City of New York found that if New York State started keeping a tax of 0.25 cents per share traded, it would lose 23,000 to 33,000 jobs for every 10 percent drop in volume and more than $3 billion in lost revenue and economic value, probably more than offsetting the amount it collected.
Although disputed by some, increasing evidence suggests that TNF-α synergies with traditional chemotherapeutic drugs to exert a heightened antitumor effect.
Turnout, although disputed, was generally agreed to be the highest since July 2004 when half a million people marched to have an unpopular anti-subversion law overturned and the economy was at a low ebb following the outbreak of severe acute respiratory syndrome (Sars).
A commonly cited (although disputed) story of how Moon joined the Who is that he appeared at a show shortly after Sandom's departure, where a session drummer was used.
The monophyly of Vespertilionidae, although disputed in other works [19], [20], is well supported in the Jones et al. [16] supertree and in a recent molecular phylogenetic analysis [15].
Although disputed by some urologists [ 68], the minimal requirements for the acquisition of MR images can be met with the generally available 1.5- and 3-T MR systems.
Although disputing the character of this implacable succession of the forms of government, Aristotle also based his classification on the number of rulers and distinguished between good and bad forms of government.
He later apologized, although he disputed the thrust of the resulting news article.
Entertainment Weekly reported the graphic novel as the biggest seller of the week, although many disputed this claim.
St. John's opened with an 8-0 run to help swing the momentum, although Calhoun disputed that notion afterward.
Although she disputed whether several of the sites had a solid gang association, she said, "if it makes money for a good cause, more power to them".
