function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Adler, Peter H. & Crosskey, Roger W.', 3],
    ['Adler, Peter H. & S, Ümit & Irin', 9],
    ['Adler, Peter H. & Sirin, Umit D.', 1],
    ['Belqat, Boutaïna & Adler, Peter H. & Cherairia, Mouna', 1],
    ['Belqat, Boutaïna & Adler, Peter H. & Crosskey, Roger W.', 1],
    ['Crosskey, R. W.', 1],
    ['Crosskey, Roger W. & Crosskey, Margaret E.', 5],
    ['Ivkovic, Marija & Doric, Valentina & Baranov, Viktor', 1],
    ['Ivković, Marija & Kúdela, Matuš & Kúdelová, Tatiana', 1],
    ['Kim, Sam-Kyu', 4],
    ['Sirin, Uemit Davut & Caliskan, Hakan & Sahin, Yalcin', 2],
    ['Takaoka, Hiroyuki & Saito, Katsumi & Adler, Peter H.', 1],
    ['Telfer, Angela C & Young, Monica R & Quinn, Jenna & Perez, Kate', 1]
  ]);
  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);