function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Aguin-Pombo, Dora & Freitas, Carlos', 3],
    ['Borges, Paulo A. V. & Gaspar, Clara', 18],
    ['Freitas, Énio & Aguín-Pombo, Dora', 3],
    ['Larivière, Marie-Claude', 2],
    ['Luo, Yang & Bourgoin, Thierry & Zhang, Jia-Lin & Feng, Ji-Nian', 95],
    ['Mozaffarian, Fariba', 1],
    ['Picciau, Luca & Hoch, Hannelore & Asche, Manfred', 5],
    ['Walker, Francis', 19]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=146)',
    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);