function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Daday, Eugen V.', 1],
    ['George, Sunny & Martens, Koen', 1],
    ['Horne, David J. & Jocque, Merlijn & Brendonck, Luc', 1],
    ['Meisch, Claude & Smith, Robin J. & Martens, Koen', 2],
    ['Okubo, Ichiro & Terauchi, Makoto', 1],
    ['Peng, Ping & Zhai, Dayou & Smith, Robin J. & Wang, Qianwei', 1],
    ['Sabater, Lara Milena & Monferran, Mateo Daniel & Higuti, Janet', 3],
    ['Scott-Frías, Joxmer & González, Ernesto & Pardo, María José', 2],
    ['Smith, Robin James', 1],
    ['Smith, Robin James & Lee, Jimin & Chang, Cheon Young', 1],
    ['Szwarc, Agata & Martens, Koen & Namiotko, Tadeusz', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=15)',
    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);