1	TS=((DNA OR parallel OR next-generation OR shotgun OR target∗) NEAR sequenc∗)
2	TS= (MPSS OR NGS OR CSS OR TMPS)
3	TS=((high throughput NEAR (analys?s OR sequenc∗)) OR single nucleotide polymorphism∗ OR SNP OR SNPs)
4	#1 OR #2 OR #3
5	TS=((genetic∗ OR gene OR genes OR genome∗ OR genomic∗) NEAR (test OR tests OR testing OR diagnos?s OR screen∗))
6	TS=(noninvasive∗ or non-invasive∗)
7	#5 AND #6
8	#4 OR #8
9	TS= ((antenatal OR ante-natal OR intrauterine OR intra-uterine OR prenatal OR pre-natal) NEAR (test OR tests OR testing OR diagnos?s OR detect∗ OR screen∗))
10	TS= (maternal NEAR (plasm∗ OR blood))
11	#9 OR #10
12	#8 AND #11
13	TS=(((fetal OR faetal OR fetus∗ OR faetus∗ OR free-fetal OR free-faetal OR placenta∗) NEAR dna) OR cell-free dna)
14	TS=(cff DNA OR cffDNA OR cf DNA OR cfDNA OR f DNA OR fDNA OR ff DNA OR ffDNA)
15	TS=((noninvasive∗ OR non-invasive∗) NEAR (prenatal OR fetal OR faetal OR fetus OR faetus∗) NEAR (test OR tests OR testing OR diagnos?s OR detect∗ OR screen∗))
16	TS=(NIPT OR NIPD OR NIDT OR gNIPT OR NIPS)
17	#12 OR #13 OR #14 OR #15 OR #16
18	TS=interview∗
19	TS=(theme∗)
20	TS=(thematic analysis)
21	TS=qualitative
22	TS=nursing research methodology
23	TS=questionnaire
24	TS=(ethnograph∗)
25	TS= (ethnonursing)
26	TS=(ethnological research)
27	TS=(phenomenol∗)
28	TS=(grounded theor∗) OR TS=(grounded stud∗) OR TS=(grounded research) OR TS=(grounded analys?s)
29	TS=(life stor∗) OR TS=(women's stor∗)
30	TS=(emic) OR TS=(etic) OR TS=(hermeneutic) OR TS=(heuristic) OR TS=(semiotic) OR TS=(data saturat∗) OR TS=(participant observ∗)
31	TS=(social construct∗) OR TS=(postmodern∗) OR TS=(post structural∗) OR TS=(feminis∗) OR TS=(interpret∗)
32	TS=(action research) OR TS=(co-operative inquir∗)
33	TS=(humanistic) OR TS=(existential) OR TS=(experiential) OR TS=(paradigm∗)
34	TS=(field stud∗) OR TS=(field research)
35	TS=(human science)
36	TS=(biographical method∗)
37	TS=(theoretical sampl∗)
38	TS=(purposive sampl∗)
39	TS=(open-ended account∗) OR TS=(unstructured account) OR TS=(narrative∗) OR TS=(text∗)
40	TS=(life world) OR TS=(conversation analys?s) OR TS=(theoretical saturation)
41	TS=(lived experience∗) OR TS=(life experience∗)
42	TS=(cluster sampl∗)
43	TS=observational method∗
44	TS=(content analysis)
45	TS=(constant comparative)
46	TS=(discourse analys?s) or TS =(discurs∗ analys?s)
47	TS=(narrative analys?s)
48	TS=(heidegger∗)
49	TS=(colaizzi∗)
50	TS=(spiegelberg∗)
51	TS=(van manen∗)
52	TS=(van kaam∗)
53	TS=(merleau ponty∗)
54	TS=(husserl∗)
55	TS=(foucault∗)
56	TS=(corbin∗)
57	TS=(strauss∗)
58	TS=(glaser∗)
59	#18 OR #19 OR #20 OR #21 OR #22 OR #23 OR #24 OR #25 OR #26 OR #27 OR #28 OR #29 OR #30 OR #31 OR #32 OR #33 OR #34 OR #35 OR #36 OR #37 OR #38 OR #39 OR #40 OR #41 OR #42 OR #43 OR #44 OR #45 OR #46 OR #47 OR #48 OR #49 OR #50 OR #51 OR #52 OR #53 OR #54 OR #55 OR #56 OR #57 OR #58
60	#17 AND #59