function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Cetra, Nicolás & Roche, Andrea', 1],
    ['Delgado, Marlon & Freire, Fúlvio Aurélio de Morais', 1],
    ['Do, Thinh Dinh & Jung, Dae-Wui & Kil, Hyun-Jong & Kim, Chang-Bae', 3],
    ['Edmunds, Malcolm', 1],
    ['Ekimova, Irina A. & Grishina, Darya Yu.', 2],
    ['Miller, Michael Charles', 1],
    ['Rudman, William B.', 2],
    ['Salvador, Xavier & Fernández-Vilert, Robert & Moles, Juan', 1],
    ['Schrödl, Michael', 1],
    ['Tibiriçá, Yara & Pola, Marta & Cervera, Juan Lucas', 3],
    ['Valdés, Ángel', 4],
    ['Yonow, Nathalie & Anderson, R. Charles & Buttress, Susan G.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=21)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 12, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);