function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bubík, Miroslav & Doláková, Nela & Kvaček, Zlatko', 1],
    ['Denk, Thomas & Sami, Marco & Teodoridis, Vasilis', 1],
    ['Howell, Nathan & Krings, Alexander & Braham, Richard R', 2],
    ['Jarvis, Charlie', 1],
    ['Kvaček, Zlatko & Teodoridis, Vasilis & Radoň, Miroslav', 1],
    ['Mille, Christian & Henderson, Rosa C. & Cazères, Sylvie', 1],
    ['Teodoridis, Vasilis & Kvaček, Zlatko & Radoň, Miroslav', 1],
    ['Thornhill, Robert & Krings, Alexander & Lindbo, David', 2],
    ['Tiffney, Bruce H. & Manchester, Steven R.', 1],
    ['Wheeler, Elisabeth A. & Manchester, Steven R. & Baas, Pieter', 1],
    ['Zhang, Wei-Ping & Bai, Wei-Ning & Zhang, Da-Yong', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=13)',
    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);