(1) These symptoms can occur with many diseases

(2) The last appearance of D. murchisoni appears to occur at the same time across the region.

(3) Did it ever occur to you to ask?

(4) Also it was found that recombination events often occur in gene-rich areas.

(5) Problems occur with that computer

(6) On average, nodes preceding gene duplications occur earlier in the phylogenetic trees than speciation nodes.

(7) The functional impairments secondary to osteoarthritis also occur more frequently in older adults.

(8) Oakwoods occur on ancient sites

(9) Although most often accompanied by significant ascites, it can occur in its absence.

(10) Most accidents occur due to a lack of discipline and a leader's failure to enforce standards.

(11) Does ozone occur naturally at ground level and is it safe to breathe?

(12) Keep in mind, however, that the most serious accidents typically occur during deer season.

(13) The data show that aggregation will occur in the absence of detectable plasma fibrinogen.

(14) Hallucinations usually occur only at particular times and places, and are associated with the events hoped for.

(15) Changes often occur in the regions of the mouth where tobacco is placed.

(16) Other elements occur naturally in a pure or elemental form, like sulphur or gold.

(17) Consequently accidents still occur due to a lack of awareness of the dangers involved with electricity.

(18) Surface exposures of Ncogene sedimentary rocks occur only along the edges of the basin.

(19) Of course, events do occur which accelerate the processes by which people become conscious.

(20) Several short-term wins occurred as a result of the formation of the College Connection.