function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Barbar, Ziad & Parker, Bruce & Auger, Philippe', 1],
    ['Farzan, Sadegh & Asadi, Mahdieh & Ueckermann, Edward', 2],
    ['Hasanvand, Iman & Jafari, Shahriar & Khanjani, Masoumeh', 3],
    ['KhanK, Eid Muhammad & KamranK, Muhammad & AlatawiK, Fahad Jaber', 2],
    ['Khanjani, Masoumeh & Khanjani, Mohammad & Seeman, Owen D.', 7],
    ['Kontschan, Jeno & Ripka, Geza', 1],
    ['LIU, DONG & YI, TIAN-CI & XU, YUN & ZHANG, ZHI-QIANG', 6],
    ['Raissi Ardali, M. & Hadizadeh, A. & Mohammadi Sharif, M.', 1],
    ['Stathakis, Theodoros I. & Vrettos, Dimitrios P.', 2],
    ['Ueckermann, Edward A. & Palevsky, Eric & Gerson, Uri', 2],
    ['Çobanoğlu, Sultan & Ueckermann, Edward Albert', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=30)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 11, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);