Please select the eligibility criteria that correspond to the clinical trial below.
Title: The Effects of Electronic Cigarette Smoking on the Arterial Wall and Endothelial Glycocalyx Properties of Smokers
Brief Summary: Electronic cigarette is proposed as a bridge to smoking cessation. In this study we examine its effects on aortic elasticity, glycocalyx integrity, and exhaled carbon monoxide (CO) concentration and platelet function, both acutely and after 1 month of use.


Options:
A: Inclusion Criteria:

Participants must:

1. be aged 18 years or older
2. reside in Washington, D.C. metro area (including VA and MD suburbs)
3. be proficient in English
4. be daily smoker with at least 5 years of established daily smoking

   * A person will be categorized as a daily smoker if he reports daily smoking of at least 8 cigarettes a day for the past 5 years, and records an exhaled air carbon monoxide (CO) level \> 8 parts-per-million (ppm) at the baseline in-person meeting.
   * Daily smokers will be eligible for the main study if they do not intend to quit in the next 30 days.
   * If they do intend to quit in the next 30 days, eligible daily smokers will be enrolled in the second arm of the study.
5. not taking smoking cessation medications;
6. smoked LCC/cigars/hookah less than 5 times in last 30 days
7. have not used other tobacco products in last 30 days
8. have not used an ENDS product (electronic cigarette) in the last 30 days
9. be interested in trying an ENDS
10. have an iPhone or Android that allows installation of applications and use it daily
11. have a phone plan that allows unlimited text messages
12. be willing to travel to the data collection cite four times in three weeks
13. not be breastfeeding or planning to become pregnant
14. not have heart disease/uncontrolled blood pressure
15. not have psychosis/suicidal thoughts
16. not be currently enrolled in an alcohol treatment program
17. not be out of town for more than 5 nights in the next 6 weeks

Exclusion Criteria:

* Individuals who do not satisfy the criteria above will not be eligible for this study.
* There will be no involvement of vulnerable populations.
B: Inclusion Criteria:

* smokers (≥ 5 cigarettes/day for \> 1 yr and breath CO \> 5 ppm)
* ages 18-65 years
* ICD-10 diagnosis of schizophreniform, schizophrenia, schizoaffective or bipolar disorder

Exclusion Criteria:

* used e-cigs on \> 2 occasions in the past 30 days;
* intend to quit smoking within the next 30 days;
* currently use medications that may reduce smoking (bupropion, varenicline, NRT, naltrexone, buprenorphine, acamprosate, baclofen, clonidine, nortriptyline, anti-seizure medications, disulfiram);
* have unstable psychiatric conditions (hospitalization or change in dose of chronic medication in the past 30 days);
* People with a serious medical condition including uncontrolled high blood pressure, something wrong with their heart or blood vessels that occurred or got worse in the past 3 months (including fast or irregular heart rhythm, angina, chest pain, had a heart attack or stroke).
* People who have ever had a serious stomach ulcer, and/or phaeochromocytoma (tumor of the adrenal gland).
* People who in the last 3 months have had severe heartburn; or a stroke, or unstable kidney disease, unstable liver disease, uncontrolled over-active thyroid gland
* met DSM-IV criteria for drug dependence
* have medical contraindications to nicotine, since nicotine intake may increase in this study;
* have past-month suicidal ideation or past-year suicide attempt.
* are pregnant, as determined through a pregnancy test
C: Inclusion Criteria:Healthy smokers 18-60 years old, smoking ≥15 conventional cigarettes per day (cig/day) for at least 10 years were recruited using anti-smoking leaflets and by an approved kiosk located in the atrium of the university hospital (AOU 'Policlinico-V. Emanuele') promoting the smoking cessation services of the CPCT (Centro per la Prevenzione e Cura del Tabagismo, Università di Catania, Italy).

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Exclusion Criteria:history of alcohol and illicit drug use, major depression or other psychiatric conditions. We also excluded subjects who reported recent myocardial infarction, angina pectoris, essential hypertension (\>140mmHg systolic and/or \>90mmHg diastolic), diabetes mellitus, severe allergies, poorly controlled asthma or other airways diseases

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D: Inclusion Criteria:

* Active conventional cigarette smoker

Exclusion Criteria:

* Health condition adversely affected by smoking, history or presence of cardiovascular disease

Answer: D