The phrase "are often additional" is correct and usable in written English.
It can be used when discussing items or elements that are frequently included or added to something else.
Example: "In many recipes, spices are often additional ingredients that enhance the flavor."
Alternatives: "are frequently extra" or "are commonly supplementary".
In addition to risk protection, there are often additional benefits, such as income riders, which will guarantee for life your income payout as long as there is a guaranteed fixed interest rate.
In the holidays there are often additional activities for children.
Even then there is no guarantee of timely approval of a visa request, since there are often additional "requests for evidence" of a performer's artistic worth or personal background.
When you watch the news on cable television, there are often additional stories being scrolled across the bottom of the screen, stock market results blinking on the right of the screen, and promos for upcoming features on the left.
It is also important to look at more than just the rates, as there are often additional benefits beyond the interest.
Historically, there have been separately staffed "emergency admission areas" (Notfallaufnahme, here forth referred to as "emergency rooms") within individual hospitals for internal medicine, surgery, trauma, gynecology and obstetrics, pediatrics, and in larger teaching hospitals, there are often additional emergency rooms for ophthalmology and otolaryngology, among others [5 7].
With banking sites there is often additional software it suggests a user can download as an extra layer of detection.
For example, analysts note that there is often additional short-selling in December, related to end-of-the-year tax strategies.
The avenues were given consecutive numbers, but there were often additional parallel streets in between the avenues that needed names, so they were assigned the same numbers and called roads or drives, in that order.
While participants reported that the interventions had mixed impact on the frequency of ED visits, there were often additional, unforeseen intervention rewards.
7 However, the current treatment for refractory patients is often additional IVIG, sometimes in combination with other treatment methods, 8 but before making a therapeutic decision, physicians should consider the benefits of the treatment versus the risk of developing CAAs.
