function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Conde-Vela, Victor Manuel', 2],
    ['Glasby, Christopher J.', 2],
    ['Glasby, Christopher J. & Fiege, Dieter & Damme, Kay Van', 4],
    ['Glasby, Christopher J. & Timm, Tarmo & Muir, Alexander I.', 15],
    ['Mikac, Barbara', 1],
    ['Nunez 1, Jorge & Glasby 2, Christopher J. & Naranjo 3, Manuel', 3],
    ['Salazar-Vallejo, Sergio I. & Carrera-Parra, Luis F.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=28)',
    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);