Whether "9644" refers to a , a LEGO set , or a specific version of a digital file.
One specific match is a German medical study regarding colorectal cancer trajectories:
: "Kcnq2/Kv7.2 controls the threshold and bi-hemispheric symmetry of cortical spreading depolarization."
: "Sektorenübergreifende Versorgungsverläufe von Patient*innen mit kolorektalem Karzinom in Sachsen-Anhalt" (Cross-sectoral care trajectories of patients with colorectal cancer in Saxony-Anhalt). Journal : Gesundheitswesen , August 10, 2023. DOI : 10.1055/a-2106-9644 . Another reference is found in neurobiology research:
: Brain , 2019, pages 9633-9644 (Epub Oct 18, 2019).
The search results for primarily refer to medical research articles with specific publication IDs (DOI or PMID) that contain the sequence "9644" and were published electronically (Epub) before appearing in print.