function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Fernández-Alonso, José Luis & Cogollo-Pacheco, Álvaro', 2],
    ['Jarvis, Charlie', 2],
    ['Linnaeus, Carolus', 2],
    ['Molino, Jean-François & Sabatier, Daniel & Grenand, Pierre', 1],
    ['Niccolini, Gabriele & Martinetto, Edoardo & Lanini, Benedetta', 1],
    ['Quang, Bui Hong & Nuraliev, Maxim S.', 16],
    ['Zavatin, Danilo Alvarenga & Almeida, Roberto Baptista Pereira', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=25)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 7, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);