function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Arango, Claudia P.', 3],
    ['Bamber, Roger & Takahashi, Yoshie', 1],
    ['Krapp, Franz & Kocak, Cengiz & Katagan, Tuncer', 2],
    ['Lehmann, Tobias & Hess, Martin & Melzer, Roland R.', 2],
    ['León-Espinosa, Angel De & León-Gonzalez, Jesus Angel De', 2],
    ['Lucena, Rudá Amorim & Christoffersen, Martin Lindsey', 2],
    ['Müller, Hans-Georg & Krapp, Franz', 9],
    ['Sabroux, Romain & Hassanin, Alexandre & Corbari, Laure', 9],
    ['Staples, David A.', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=33)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 9, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);