The timing is organized in time slots, which are collected to so-called slotframes.
Fewer than 20 specimens have been deposited in museum collections, most of which were collected prior to 1900.
All 21 samples were tested, including three examples of R. nativitatis, which were collected prior to the introduction of black rats to Christmas Island.
Venous blood samples were collected within 1 week of the semen collection, except for a subgroup of 116 Greenlandic samples, which were collected up to 1 year in advance.
The analytical dataset used data on migration events and socio-demographic characteristics which were collected prior to the HIV test date.
Thirty-two skeletons were collected from the U3 unit, four of which were collected prior to the Hell Creek Project by the Museum of the Rockies (MOR 009, Tyrannosaurus; MOR 004, Triceratops; MOR 555, Tyrannosaurus; MOR 622, Triceratops; MOR 007, Edmontosaurus).
We therefore compared telomere lengths in these two sets of cases with those in the COGS cases, which were collected closer to diagnosis.
A cell scraper was used to gather cell lysates, which were collected and transferred to a microcentrifuge tube and centrifuged for 15 minutes at 12,000 × g (4°C).
Meanwhile, ultrastructural analysis was carried out with 1 × 10 cells which were collected by centrifugation to deposit the cell pellets.
Metabolite profiling was performed using stamens of stage 1, 3 and 6, which were collected and subjected to non-targeted metabolite profiling.
