function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Kondo, Takumasa', 1],
    ['Kondo, Takumasa & González, Héctor', 4],
    ['Kondo, Takumasa & Pellizzari, Giuseppina', 1],
    ['Kondo, Takumasa & Williams, Michael L.', 1],
    ['Novoa, Nereida Mestre & Hamon, Avas & Evans, Greg', 2],
    ['Williams, Douglas J. & Ben-Dov, Yair', 1],
    ['de, María Cristina Granara & Willink', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=12)',
    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);