function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Campião, Karla Magalhães & Morais, Drausio Honorio', 2],
    ['Fugassa, Martin H.', 1],
    ['García-Prieto, Luis & Falcón-Ordaz, Jorge', 1],
    ['García-Prieto, Luis & Garcia-Varela, Martín', 1],
    ['Halajian, Ali & Smales, Lesley R. & Tavakol, Sareh', 2],
    ['Hernández-Orts, Jesús S. & Kuchta, Roman & Semenas, Liliana', 10],
    ['Lopes, Daniela A. & Gomes, Delir Correa & Knoff, Marcelo', 1],
    ['Muniz-Pereira, Luís C. & Vieira, Fabiano M. & Luque, José L.', 2],
    ['Panti-May, Jesús Alonso & Digiani, María Celina', 1],
    ['Paredes-León, Ricardo & García-Prieto, Luis', 4],
    ['Santos, Cláudia Portes & Gibson, David I.', 1],
    ['Tavakol, Sareh & Amin, Omar M. & Luus-Powell, Wilmien J.', 6],
    ['Vieira, Fabiano M. & Luque, José L. & Muniz-Pereira, Luís C.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=33)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 13, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);