"insufficient familiarity" is correct and usable in written English.
You can use it to describe a situation in which a person does not have a full understanding of something because they have not seen or experienced it before. For example, "Due to his insufficient familiarity with the equipment, he wasn't able to complete the task correctly."
Most experts gave the reason for abstention as insufficient experience or lack of familiarity with the current state of evidence for oncological treatments.
Because treatment of monkey bites is not a standard part of US medical education, inadequate treatment could reflect insufficient training and lack of familiarity among US-trained health care providers.
This survey identified a number of barriers for health professionals in completing developmental monitoring, including time constraints, inadequate reimbursement, lack of non-physician support staff, lack of further diagnostic and treatment services, insufficient training, and lack of familiarity with assessment tools.
DOI: http://dx.doi.org/10.7554/eLife.01385.007 The finding that fostered rats did not help SD strangers indicates that a rat's familiarity with himself is insufficient to motivate helping for individuals of his strain.
Reported barriers included concerns about patient adherence, insufficient scientific evidence about treatment, and lack of familiarity with current recommendations.
The decrease in the completion of phone-based back referrals from the health facilities could be because of insufficient training of facility staff and a lack of their familiarity with the phone system.
This lack of a relationship indicates that the potentially general effects from parents' incorporation, such as increased familiarity with the school system or social capital, are insufficient to increase their children's performance in math.
For lipid management, the top three perceived barriers were difficulties making lifestyle changes in patients (78%), insufficient evidence about best management practice (71%), and providers' lack of familiarity with subject matter (47%).
Mental health nurses and allied health professionals disclose insufficient experience in patient-led goal formulation and lack knowledge and familiarity with the range of services available to address service users' social needs.
