Of note, scarce studies of trauma centenarians are available [37].
These scarce studies revealed that outcomes of nonagenarians were not worse than those of octogenarians.
Scarce studies on sAA in MDD produce confounded results and no data is available regarding baseline sAA activity.
Since only scarce studies exist comparing both techniques directly, we decided to additionally include any study on MSA in which information on the applied technique, e.g. conventional or piezosurgery, was retrievable and additionally reporting on the incidence of membrane perforations.
Although it is essential to understand the potential impacts of salinity on adult oyster resources in order to adapt and manage for long-term sustainability, scarce studies were available.
Scarce studies so far have indicated net accumulation in tidal freshwater marshes in the Scheldt estuary over a decadal timescale (burial of about 40% of imported BSi without dissolution to DSi).
Still, data to support a nap's usefulness were scarce: Studies in adults have found that sleep helps consolidate memories and learning, but whether the same is true of brief naps in the preschool set was unknown.
Though hominin remains are scarce, studies focussing on the more abundant records of fossil land mammal communities can contribute greatly to our knowledge of the palaeoenvironmental circumstances that influenced and directed the global spread of hominins.
However, there are scarce studies on the relationships between growth and flowering of the young tree and the fruiting pattern, i.e. regular vs. alternate bearing, of the adult tree.
Regulation of cyclic nucleotides has been rarely explored in diatoms, and only scarce studies exist.
