function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Becherer', 7],
    ['Cabezudo, Baltasar & Solanas, Federico Casimiro-Soriguer', 12],
    ['Domina, Gianniantonio & Uhlich, Holger & Barone, Giulio', 1],
    ['Frajman, Božo & Carlón, Luis & Kosachev, Petr', 1],
    ['Hess, Hans Ernst & Landolt, Elias & Hirzel, Rosmarie', 20],
    ['Info Flora', 30],
    ['Jarvis, Charlie', 4],
    ['Jeanmonod, Daniel', 4],
    ['Konrad Lauber & Gerhart Wagner & Andreas Gygax', 23],
    ['Mokni, Ridha El & Domina, Gianniantonio & Barone, Giulio', 5],
    ['Piwowarczyk, Renata & Pedraja, Oscar Sanchez', 1],
    ['Piwowarczyk, Renata & Pedraja, Óscar Sánchez', 23],
    ['Pujadas-Salvà, Antonio J. & Arguimbau, Pere Fraga I', 4],
    ['Reich, Dieter & Gutermann, Walter & Bardy, Katharina', 1],
    ['Shuka, Lulezim & Tan, Kit', 2],
    ['Other (2)', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=140)',
    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);