The phrase "a further differentiation" is correct and usable in written English.
It can be used when discussing the need to make additional distinctions or classifications in a particular context.
Example: "In our analysis, we found a further differentiation between the two species that had not been previously noted."
Alternatives: "an additional distinction" or "a more detailed differentiation".
A further differentiation in the model structure might be beneficial (Kröner et al. 2005; Scherer 2012; Sonnleitner et al. 2013).
A further differentiation can be made, considering the time of onset: within 96 hours from intubation (early onset VAP) or after 96 hours of intubation (late onset VAP).
The federal level is in charge of roads which are predominantly used for interstate traffic, with a further differentiation between federal motorways ('Bundesautobahnen') and federal highways ('Bundesstraßen').
Since social capital manifested in very different forms and on different levels of investigation, a further differentiation of the concept is needed.
Furthermore, Koppelt (2011) clarified that from a theoretical and conceptual perspective, a further differentiation of the problem-solving factors would lead to unreliable fits of items to these factors.
Prolonged culture did not induce a further differentiation into the DN4 (CD4−CD8−CD44−CD25−) population.
Together these results indicate that using data on joint erosion disease does not result in an important further differentiation of the risk estimation for RA in patients with UA additive to the predictive ability of the known clinical and serological factors.
Altogether these observations - i.e. low frequency of hematopoietic colonies, limited proliferation, bias toward erythropoiesis and absence of adult globin synthesis - suggest that ESC differentiated in vitro exhibit a block in further differentiation that prevents them to reach the same stage than CB-HSC.
In contrast, the SNARE cycle members were highly expressed in cluster C3, pointing to a role in further differentiation during the lobe stages for Md1404 (similar to plant syntaxin 32) and Md1560 (similar to a regulatory AAA-type of ATPase).
If question (1) is answered in the negative, question (2), "Is the patient bedridden for more than half a day?", provides further differentiation between the states B (not able to work) and C (not capable of self-care).
These results show that ATF2 is specifically expressed, between E11.5 and E12.5, in all visceral and somatic motoneurons we examined and may thus play a role in the further differentiation of these neurons.
