function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Cabezudo, Baltasar & Solanas, Federico Casimiro-Soriguer', 1],
    ['Funk, Vicki A. & Wood, Kenneth R.', 1],
    ['Grabovskaya-Borodina, Alisa E. & Illarionova, Irina D.', 1],
    ['Hess, Hans Ernst & Landolt, Elias & Hirzel, Rosmarie', 8],
    ['Howell, Nathan & Krings, Alexander & Braham, Richard R', 2],
    ['Info Flora', 10],
    ['Jarvis, Charlie', 17],
    ['Jeanmonod, Daniel & Schlüssel, André', 1],
    ['Konrad Lauber & Gerhart Wagner & Andreas Gygax', 7],
    ['Lee, Jong-Won & Yun, Ho-Geun & Hwang, Tae Young & Kim, Kyungmin', 5],
    ['Nacoulma, Blandine M. I. & Schmidt, Marco & Hahn, Karen', 3],
    ['Sennikov, Alexander & Lazkov, Georgy', 1],
    ['Sennikov, Alexander N. & Lazkov, Georgy A.', 1],
    ['Wagner, Warren L. & Clark, John R. & Lorence, David H.', 10],
    ['Zhou, Ya-Dong & Mwachala, Geoffrey & Hu, Guang-Wan', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=71)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 15, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);