function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['García-Prieto, Luis & Garcia-Varela, Martín', 1],
    ['Halajian, Ali & Smales, Lesley R. & Tavakol, Sareh', 1],
    ['Hernández-Orts, Jesús S. & Kuchta, Roman & Semenas, Liliana', 2],
    ['Hernández-Orts, Jesús S. & Viola, M. Natalia Paso', 1],
    ['Lisitsyna, O. I. & Kudlai, O. & Spraker, T. R. & Kuzmina, T. A.', 2],
    ['Lopes, Daniela A. & Gomes, Delir Correa & Knoff, Marcelo', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=8)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 6, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);