function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['AL-Shehbaz, Ihsan A. & Barriera, Gabrielle', 6],
    ['Becherer', 2],
    ['Brock, Jordan R. & Mandakova, Terezie & Lysak, Martin A.', 1],
    ['Hess, Hans Ernst & Landolt, Elias & Hirzel, Rosmarie', 3],
    ['Info Flora', 5],
    ['Jarvis, Charlie', 1],
    ['Jeanmonod, Daniel & Schlüssel, André', 1],
    ['Konrad Lauber & Gerhart Wagner & Andreas Gygax', 2],
    ['Mosyakin, Sergei L. & Brock, Jordan R.', 1],
    ['Razeq, Fakhria M. & Kosma, Dylan K. & D & França, ebora', 1],
    ['Rodríguez-Rodríguez, Manuel Fernando & Salas, Joaquín J.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=24)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 11, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);