function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Hernández-Orts, Jesús S. & Kuchta, Roman & Semenas, Liliana', 1],
    ['Lisitsyna, Olga & Xi, Bing-Wen & Orosová, Martina', 2],
    ['Monks, Scott & Alemán-García, Berenice & Pulido-Flores, Griselda', 1],
    ['Santos, Cláudia P. & Gibson, David I. & Tavares, Luiz E. R.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=5)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 4, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);