It has been noted that the difficulty arises in the application of the classical L p -theory of Calderon-Zygmund, since Riesz transforms are singular integral operators.
The difficulty of choosing the correct control group has been noted earlier [ 9].
The vocal difficulties that have been noted in Ms. McNair's singing of late sadly continue.
It appears then that earlier studies of ADHD-related behaviours in children with HI may have over-estimated such an association possibly as a result of the difficulties that have been noted in the assessment of such behaviour in deaf children, such as failure to follow directions being the consequence of hearing impairment rather than inattention [ 124].
41 Although the associations seem to be stronger in the idiopathic analysis, we do not believe that they are necessarily generalisable because of the wide variation in definitions of idiopathic groups across existing studies, and the general difficulties that have been noted in defining such groups.
Older people can have difficulties with hearing and vision and associated difficulties with recruiting older people have been noted previously[ 23].
Since the work record allows agencies to properly enforce the requirements to obtain the pension mainly by checking the years spent in formality (contribution history), difficulties to meet these requirements have been noted in the academic and policy discussion (Forteza et al. 2009; Bucheli et al. 2010; Bosch and Manacorda 2012).
10, 19 Difficulties with speech and language have been noted in females with an extra X chromosome, with 40 to 91% needing speech therapy at some point.
Increased emotional difficulties in CFS/ME, particularly depression, have been noted to predict poorer long-term patient outcomes and responses to therapeutic interventions (Bentall, Powell, Nye, & Edwards, 2002; Wearden, Dunn, Dowrick, & Morriss, 2012).
