The UN Office for Co-ordination of Humanitarian Affairs says that despite recent gains, "the continuing instability in parts of Somalia and access restrictions for humanitarian workers remain major obstacles for aid delivery" (pdf).
The severe gaps in infrastructure and capital are also obstacles for the delivery of basic primary care in these facilities.
The plasmid DNA is readily degraded by endonucleases such as DNase I [ 121], which is one of the obstacles for the delivery of gene in vitro or in vivo.
The blood brain barrier (BBB) represents a major obstacle for the delivery and development of drugs curing brain pathologies.
Blood-brain barrier (BBB) was the major obstacle for efficient delivery of therapeutic agents to brain tissue.
Indonesia's vast size and difficult terrain presents an enormous obstacle for the delivery of health services and for a balanced distribution of health personnel.
The latter property of CPP-modified carriers accounts for their susceptibility to the so-called "kinetic barriers", a significant obstacle for drug delivery.
The authors considered this anatomical transformation as an obstacle for vaginal delivery, even though the MRI scan showed a conjugate vera of 13.4 cm [ 12].
Esp. in areas where the original tissue architecture is relatively preserved, the blood-brain barrier may form an obstacle for optimal delivery of chemotherapeutics to diffuse infiltrative tumor cells.
Poor transportation, cost of delivery at hospitals, overcrowding and ill treatment by hospital staff are some of the obstacles for achieving higher institutional delivery.
