function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Cabezudo, Baltasar & Solanas, Federico Casimiro-Soriguer', 3],
    ['Chen, Feng & He, Hai', 3],
    ['Chen, Ronglian & Zhang, Faqi & Chen, Shilong & Chi, Xiaofeng', 2],
    ['Denk, Thomas & Sami, Marco & Teodoridis, Vasilis', 5],
    ['Hess, Hans Ernst & Landolt, Elias & Hirzel, Rosmarie', 7],
    ['Howell, Nathan & Krings, Alexander & Braham, Richard R', 4],
    ['Info Flora', 9],
    ['Jarvis, Charlie', 12],
    ['Konrad Lauber & Gerhart Wagner & Andreas Gygax', 5],
    ['Kvaček, Zlatko & Teodoridis, Vasilis & Radoň, Miroslav', 4],
    ['Lee, Jong-Won & Yun, Ho-Geun & Hwang, Tae Young & Kim, Kyungmin', 11],
    ['Lin, Yun & Bi, Hai-Yan & Sun, Jun & Sun, Qian', 2],
    ['Martinetto, Edoardo & Bertini, Adele & Mantzouka, Dimitra', 2],
    ['Reich, Dieter & Gutermann, Walter & Bardy, Katharina', 5],
    ['Suh, Soo-Jung', 7],
    ['Other (13)', 16]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=97)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);