'an additional extra' is a correct and usable phrase in written English.
It is often used to describe something that is added on or included in addition to what is already there. Example: "As an apology for the inconvenience, the airline offered passengers an additional extra of a free upgrade to first class on their next flight."
Ben Wilson at Gocompare.com, says two thirds of home contents policies provide cover for home emergencies either as a standard feature or as an additional extra, typically for around £30 to £50.
Both uses were deemed valuable by the GPs, but also as an additional extra to the clinical core task.
Those uses of feedback were, however, described by all the informants as an additional extra to the professional core task, understood as the care for individuals.
Such language may indicate that self-management is still conceived as an additional extra rather than an integrated and essential aspect of successful therapy.
Beyond level 7 (1.52 m/s, 3.8 mph) shuttle walking incurred an additional extra energy cost compared with treadmill walking, which may make it difficult to show small improvements in functional capacity if reported as estimated MET values.
The increased expression of these genes (1.5- to 2-fold higher) is within the range of overexpression expected for having an additional extra copy of regulated Ink4/Arf and p53.
Therefore, an additional extra-cellular compartment ('u', lumen) was added to the sIEC reconstruction, which represents the gut lumen.
Dual pathology is a situation where FHN is accompanied by an additional extra-hippocampal brain lesion acting as an epileptic focus causing hippocampal sclerosis, or co-existing with the hippocampal lesion.
Following the accumulation of homogeneous material, the spores are coated by an additional extra-exosporal layer, referred to as the perine or perispore, which is derived from the tapetum.
Myalgia is almost always present in joint diseases as an additional extra-articular source of pain but was only accounted for when present as the main diagnosis in our cohort.
The Ultimate Edition released in 2006 had as additional extras a 2000 documentary named "Bond Cocktail", a featurette on shooting the Q Boat scenes, Pierce Brosnan in a press conference in Hong Kong, deleted scenes, and a tribute to Desmond Llewelyn.
