function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Babaeian, Esmaeil & Ghobari, Hamed & Samani, Kyumars Mohammadi', 5],
    ['Bandyopadhyay, Pritha & Karmakar, Krishna & Halliday, Bruce', 6],
    ['Beaulieu, Frederic & Quintero-Gutierrez, Edwin Javier', 2],
    ['Halliday, R. B.', 1],
    ['Joharchi, Omid & Halliday, Bruce & Khaustov, Alexander A.', 2],
    ['Joharchi, Omid & Negm, Mohamed W.', 2],
    ['Joharchi, Omid & Stanyukovich, Maria K. & Asyamova, Olga S.', 5],
    ['Keum, Eunsun & Jung, Chuleui & Joharchi, Omid', 2],
    ['Khalili-Moghadam, A. & Saboori, A.', 1],
    ['Mahjoori, M. & Hajizadeh, J. & M. R & I, Northern', 1],
    ['Nemati, Alireza & Riahi, Elham & Khalili-Moghadam, Arsalan', 1],
    ['Saboori, Alireza & Shirvani, Zeinab', 1],
    ['Willmann, C.', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=31)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 13, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);