The phrase "are practically absent from" is correct and usable in written English.
It can be used to indicate that something is nearly nonexistent in a particular context or situation.
Example: "In this study, certain demographic groups are practically absent from the sample, which may affect the results."
Alternatives: "are nearly missing from" or "are largely lacking in".
Mechanisms for clinical management coordination are practically absent from the informants' discourse in the networks studied.
Regular lake-level gauge measurements are practically absent from 1993 to the present.
Classical goblet cells account for 9% in the human trachea and are practically absent from human distal bronchioli and mouse trachea (Pavelka et al. 1976).
But in our control fed offspring, where disease is not yet present, we find that metabolic genes are practically absent from comparisons between lean- and obese-born mice.
Anyone who has taken part in citizens' debates within the framework of the pre-Laeken consultation, or has taken the trouble to listen to the messages that came to light recently in the large demonstrations that took place in Brussels, will have in mind those urgent demands which are practically absent from the Convention' s agenda as defined by the Laeken Declaration.
VAP-1 is practically absent from the endothelial surface of normal tissues [17],[17].
All these forms of cobalt were practically absent from CoFER-2 and InCoFER-2.
The increase in cell length was significant in all cases, but in contrast to cells expressing wildtype ftsZ the shape of the length distribution curve was not altered and, more important, long filaments were practically absent from the cultures (Fig. 1A, Fig. S1).
By contrast, the H3K4 methylated forms were practically absent from intergenic regions.
Further, while there is increasing emphasis on manipulating coastal waters to prevent or control HABs in other nations, it is practically absent from U.S coastal management strategies.
By contrast, they were practically absent from surgery, orthopaedics, stomatology and otorhinolaryngology (Additional file 1: Table S3 in the statistical annex).
