function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Baasanmunkh, Shukherdorj & Nyamgerel, Nudkhuu', 1],
    ['Chen, Ronglian & Zhang, Faqi & Chen, Shilong & Chi, Xiaofeng', 4],
    ['Chen, You-Sheng', 12],
    ['Grabovskaya-Borodina, Alisa E. & Illarionova, Irina D.', 5],
    ['Hess, Hans Ernst & Landolt, Elias & Hirzel, Rosmarie', 4],
    ['Info Flora', 4],
    ['Jarvis, Charlie', 7],
    ['Jibran, Muhammad & Idrees, Muhammad & Zhang, Zhiyong', 37],
    ['Konrad Lauber & Gerhart Wagner & Andreas Gygax', 4],
    ['Le Brun, P.', 1],
    ['Lee, Jong-Won & Yun, Ho-Geun & Hwang, Tae Young & Kim, Kyungmin', 5],
    ['Li, Tian & Chen, You-Sheng', 1],
    ['Li, Tian & Xu, Lian-Sheng & Chen, You-Sheng', 1],
    ['Novikov, Andriy', 1],
    ['Rana, Hum Kala & Rana, Santosh Kumar & Sun, Hang', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=88)',
    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);