function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Becherer', 9],
    ['Eggenberg, Stefan & Champoud, Luca & Leibundgut, Mary', 2],
    ['Hess, Hans Ernst & Landolt, Elias & Hirzel, Rosmarie', 8],
    ['Hitchcock, Albert Spear', 2],
    ['Info Flora', 9],
    ['Jarvis, Charlie', 2],
    ['Konrad Lauber & Gerhart Wagner & Andreas Gygax', 8],
    ['Lee, Jong-Won & Yun, Ho-Geun & Hwang, Tae Young & Kim, Kyungmin', 2],
    ['Paszko, Beata', 4],
    ['Prasad, Dileshwar & Kumar, Ravindra & Jaiswal, Shubham', 3],
    ['Saarela, Jeffery M. & Bull, Roger D. & Paradis, Michel J.', 4],
    ['Sylvester, Steven P. & Soreng, Robert J.', 11],
    ['Thornhill, Robert & Krings, Alexander & Lindbo, David', 2],
    ['Williams, Emma Victoria & Elia Ntandu, John & Ficinski, Pawel', 2],
    ['Zhou, Ya-Dong & Mwachala, Geoffrey & Hu, Guang-Wan', 2],
    ['Other (11)', 11]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=81)',
    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);