A Monitoring Guide 37 Selection priorities and criteria can be linked to types of places (e.g. prisons, psychiatric institutions), particular issues (e.g. the use of solitary confinement, access to healthcare) or categories of detainees (e.g. pre-trial, persons with disabilities). Monitoring bodies may decide that the assessment of the situation of LGBTI persons deprived of liberty will be a priority, either as a stand-alone objective or alongside other situations of vulnerability and forms of discrimination. Such decisions may be based on prior observations, information received (including letters from detainees and their relatives or friends), changes at the legal or policy level, or simply a recognition that the risks facing LGBTI persons deprived of their liberty require specific attention and dedicated consideration. In these cases, monitoring bodies will need to consider whether to assess the treatment of LGBTI persons in specific types of facilities (e.g. prisons, immigration detention centers) or to examine the issue across various detention settings. During the planning stages, monitoring bodies will need to determine what expertise, capacities, and resources will be required to achieve their objectives. They should also ensure that sufficient time is allocated for visiting each contemplated facility, in recognition of the fact that this is a prerequisite for gaining an in-depth understanding of extant power structures, relationships, and discriminatory patterns. It is also essential that monitoring bodies take into consideration situations of risk that may be amplified by intersectional factors, and pay special attention to how sexual orientation and gender identity intersects with ethnicity, gender, age, or the existence of a disability. Planning decisions will depend on context-specific factors. In some countries, for instance, closed institutions have special units or wings for gay, bisexual, and/or trans women detainees who are partially or entirely segregated from the rest of the general population (it should be noted that even when this practice is not officially ack34 Subcommittee on Prevention of Torture and Other Cruel, Inhuman or Degrading Treatment or Punishment, Analytical assessment tool for national preventive mechanisms, CAT/OP/1/rev.1, 25 January 2016, para. 22, p. 7. Chapter II human rights problems34.”