function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Becherer', 4],
    ['Breure, Abraham S. H. & Tardy, Emmanuel', 1],
    ['Cabezudo, Baltasar & Solanas, Federico Casimiro-Soriguer', 23],
    ['Essl, F. & Stöhr, O.', 1],
    ['Hess, Hans Ernst & Landolt, Elias & Hirzel, Rosmarie', 38],
    ['Iamonico, Duilio & Domina, Gianniantonio & Guarino, Riccardo', 1],
    ['Info Flora', 39],
    ['Jarvis, Charlie', 41],
    ['Jeanmonod, Daniel', 4],
    ['Jeanmonod, Daniel & Schlüssel, André', 1],
    ['Konrad Lauber & Gerhart Wagner & Andreas Gygax', 30],
    ['Lee, Jong-Won & Yun, Ho-Geun & Hwang, Tae Young & Kim, Kyungmin', 3],
    ['Reich, Dieter & Gutermann, Walter & Bardy, Katharina', 4],
    ['Scoppola, Anna & Lattanzi, Edda & Bernardo, Liliana', 5],
    ['Zhou, Ya-Dong & Mwachala, Geoffrey & Hu, Guang-Wan', 6],
    ['Other (7)', 7]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=208)',
    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);