function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Anquetin, Jérémy & Claude, Julien', 1],
    ['Kaiser, Hinrich & Carvalho, Venancio Lopes & Ceballos, Jester', 1],
    ['Pérez-García, Adán & Murelaga, X.', 2],
    ['Püntener, Christian & Anquetin, Jérémy', 1],
    ['Romano, Pedro S. R.', 1],
    ['Romano, Pedro S. R. & Gallo, Valéria & Ramos, Renato R. C.', 1],
    ['Savage, Jay M. & Bolaños, Federico', 1],
    ['Sterli, Juliana & De La Fuente, Marcelo S. & Krause, J. Marcelo', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=9)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);