function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Cabezudo, Baltasar & Solanas, Federico Casimiro-Soriguer', 2],
    ['He, Hai & Zhang, Li-Bing', 2],
    ['Hess, Hans Ernst & Landolt, Elias & Hirzel, Rosmarie', 5],
    ['Info Flora', 6],
    ['Jarvis, Charlie', 4],
    ['Kessler, Michael & Smith, Alan R. & Øllgaard, Benjamin', 2],
    ['Konrad Lauber & Gerhart Wagner & Andreas Gygax', 4],
    ['Lee, Jong-Won & Yun, Ho-Geun & Hwang, Tae Young & Kim, Kyungmin', 5],
    ['Liang, Zhen-Long & He, Zhao-Rong & Zhang, Li-Bing', 2],
    ['Lu, Ngan Thi & Zhang, Liang & Thanh, Nguyen Trung & Toan, Le Chi', 4],
    ['Qiu, Yong-Ling & Yang, Jian-Jun & Zhou, Xin-Mao & Ju, Wen-Bin', 3],
    ['Rosenstock, Eduard', 4],
    ['Roux, Jacobus P.', 7],
    ['Wan, Xia & Knapp, Ralf & Chen, De-Kui & He, Hai & Zhang, Li-Bing', 4],
    ['Zhang, Li-Bing', 12],
    ['Other (17)', 20]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=86)',
    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);