function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Barcelos, Luis MD & Rodrigues, Pedro R & Bried, Joel', 2],
    ['Boano, Giovanni & Belemsobgo, Urbain & Silvano, Fabrizio', 1],
    ['Boles, Walter E.', 4],
    ['Caballero-Viñas, Carmen & Sánchez-Nava, Petra', 1],
    ['Castro-Vargas, Fernando & Cruz-Mendivelso, Yerson', 1],
    ['Dean, W. Richard J. & Åhlander, Erik & Johansson, Ulf S.', 1],
    ['Gonza ́ Lez-Acun, Daniel A. & Palma, Ricardo L.', 1],
    ['Horsfield, Thomas', 1],
    ['Hume, Julian Pender', 1],
    ['Mlíkovský, Jiří & Frahnert, Sylke', 1],
    ['Streets, Thomas H.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=15)',
    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);