function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Becherer', 47],
    ['Cabezudo, Baltasar & Solanas, Federico Casimiro-Soriguer', 19],
    ['Francisco-Gutiérrez, Antonio & Ruiz-Sanchez, Eduardo', 29],
    ['Hess, Hans Ernst & Landolt, Elias & Hirzel, Rosmarie', 80],
    ['Info Flora', 92],
    ['Jarvis, Charlie', 65],
    ['Jeanmonod, Daniel', 5],
    ['Konrad Lauber & Gerhart Wagner & Andreas Gygax', 68],
    ['Lee, Jong-Won & Yun, Ho-Geun & Hwang, Tae Young & Kim, Kyungmin', 6],
    ['Mokni, Ridha El & Domina, Gianniantonio & Barone, Giulio', 5],
    ['Nacoulma, Blandine M. I. & Schmidt, Marco & Hahn, Karen', 14],
    ['Piwowarczyk, Renata & Pedraja, Óscar Sánchez', 31],
    ['Schneider, Adam C.', 34],
    ['Thornhill, Robert & Krings, Alexander & Lindbo, David', 18],
    ['Zhou, Ya-Dong & Mwachala, Geoffrey & Hu, Guang-Wan', 10],
    ['Other (40)', 65]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=588)',
    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);